{
  type: "paragraph",
  content: "Hello world!",
  placement: "center"
}

<p>Look at this wonderful tango:</p>
<figure>
  <iframe width="951" height="535" src="https://www.youtube.com/embed/sxm3Xyutc1s" frameborder="0" allow="autoplay;" allowfullscreen></iframe>
  <figcaption>An exquisite tango performance</figcaption>
</figure>

{
  [
    type: "paragraph",
    content: "Look at this wonderful tango:"
  ],
  [
    type: "embed",
    provider: "Youtube",
    url: "https://www.youtube.com/embed/sxm3Xyutc1s",
    width: 951,
    height: 535,
    frameborder: 0,
    allowfullscreen: true,
    allow: "accelerometer; autoplay;",
    caption: "An exquisite tango performance"
  ]  
}

<!-- wp:paragraph --> 
<p>Look at this wonderful tango:</p> 
<!-- /wp:paragraph -->  
<!-- wp:core-embed/youtube {"url":"https://www.youtube.com/embed/sxm3Xyutc1s","type":"rich","providerNameSlug":"embed-handler","className":"wp-embed-aspect-16-9 wp-has-aspect-ratio"} --> 
<figure class="wp-block-embed-youtube wp-block-embed is-type-rich is-provider-embed-handler wp-embed-aspect-16-9 wp-has-aspect-ratio">
  <div class="wp-block-embed__wrapper"> https://www.youtube.com/embed/sxm3Xyutc1s </div>
  <figcaption>An exquisite tango performance</figcaption>
</figure> 
<!-- /wp:core-embed/youtube -->

function extract_caption($content) 
{
  $matches = [];
  preg_match('/<figcaption>(.*?)<\/figcaption>/', $content, $matches);
  if ($caption = $matches[1]) {
    return strip_tags($caption, '<strong><em>');
  }
  return null;
}

[
  // Simple block
  {
    "blockName": "core/image",
    "attrs": {
      "id": 70,
      "sizeSlug": "large"
    },
    "innerBlocks": [],
    "innerHTML": "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/sandwich-1024x614.jpg\" alt=\"\" class=\"wp-image-70\"/><figcaption>This is a normal block</figcaption></figure>\n",
    "innerContent": [
      "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/sandwich-1024x614.jpg\" alt=\"\" class=\"wp-image-70\"/><figcaption>This is a normal block</figcaption></figure>\n"
    ]
  },
  // Empty block divider
  {
    "blockName": null,
    "attrs": [],
    "innerBlocks": [],
    "innerHTML": "\n\n",
    "innerContent": [
      "\n\n"
    ]
  },
  // Reference to reusable block
  {
    "blockName": "core/block",
    "attrs": {
      "ref": 218
    },
    "innerBlocks": [],
    "innerHTML": "",
    "innerContent": []
  },
  // Empty block divider
  {
    "blockName": null,
    "attrs": [],
    "innerBlocks": [],
    "innerHTML": "\n\n",
    "innerContent": [
      "\n\n"
    ]
  },
  // Nested block
  {
    "blockName": "core/columns",
    "attrs": [],
    // Contained nested blocks
    "innerBlocks": [
      {
        "blockName": "core/column",
        "attrs": [],
        // Contained nested blocks
        "innerBlocks": [
          {
            "blockName": "core/image",
            "attrs": {
              "id": 69,
              "sizeSlug": "large"
            },
            "innerBlocks": [],
            "innerHTML": "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/espresso-1024x614.jpg\" alt=\"\" class=\"wp-image-69\"/></figure>\n",
            "innerContent": [
              "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/espresso-1024x614.jpg\" alt=\"\" class=\"wp-image-69\"/></figure>\n"
            ]
          }
        ],
        "innerHTML": "\n<div class=\"wp-block-column\"></div>\n",
        "innerContent": [
          "\n<div class=\"wp-block-column\">",
          null,
          "</div>\n"
        ]
      },
      {
        "blockName": "core/column",
        "attrs": [],
        // Contained nested blocks
        "innerBlocks": [
          {
            "blockName": "core/paragraph",
            "attrs": [],
            "innerBlocks": [],
            "innerHTML": "\n<p>This is how I wake up every morning</p>\n",
            "innerContent": [
              "\n<p>This is how I wake up every morning</p>\n"
            ]
          }
        ],
        "innerHTML": "\n<div class=\"wp-block-column\"></div>\n",
        "innerContent": [
          "\n<div class=\"wp-block-column\">",
          null,
          "</div>\n"
        ]
      }
    ],
    "innerHTML": "\n<div class=\"wp-block-columns\">\n\n</div>\n",
    "innerContent": [
      "\n<div class=\"wp-block-columns\">",
      null,
      "\n\n",
      null,
      "</div>\n"
    ]
  },
  // Empty block divider
  {
    "blockName": null,
    "attrs": [],
    "innerBlocks": [],
    "innerHTML": "\n\n",
    "innerContent": [
      "\n\n"
    ]
  },
  // Block group
  {
    "blockName": "core/group",
    "attrs": [],
    // Contained grouped blocks
    "innerBlocks": [
      {
        "blockName": "core/image",
        "attrs": {
          "id": 71,
          "sizeSlug": "large"
        },
        "innerBlocks": [],
        "innerHTML": "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/coffee-1024x614.jpg\" alt=\"\" class=\"wp-image-71\"/><figcaption>First element of the group</figcaption></figure>\n",
        "innerContent": [
          "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/coffee-1024x614.jpg\" alt=\"\" class=\"wp-image-71\"/><figcaption>First element of the group</figcaption></figure>\n"
        ]
      },
      {
        "blockName": "core/paragraph",
        "attrs": [],
        "innerBlocks": [],
        "innerHTML": "\n<p>Second element of the group</p>\n",
        "innerContent": [
          "\n<p>Second element of the group</p>\n"
        ]
      }
    ],
    "innerHTML": "\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container\">\n\n</div></div>\n",
    "innerContent": [
      "\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container\">",
      null,
      "\n\n",
      null,
      "</div></div>\n"
    ]
  }
]

/**
 * Export all (Gutenberg) blocks' data from a WordPress post
 */
function get_block_data($content, $remove_divider_block = true)
{
  // Parse the blocks, and convert them into a single-level array
  $ret = [];
  $blocks = parse_blocks($content);
  recursively_add_blocks($ret, $blocks);

  // Maybe remove blocks without name
  if ($remove_divider_block) {
    $ret = remove_blocks_without_name($ret);
  }

  // Remove 'innerBlocks' properties for all blocks (since that code was copied to the first level, it is currently duplicated)
  foreach ($ret as &$block) {
      unset($block['innerBlocks']);
  }

  return $ret;
}

/**
 * Remove the blocks without name, such as the empty block divider
 */
function remove_blocks_without_name($blocks)
{
  return array_values(array_filter(
    $blocks,
    function($block) {
      return $block['blockName'];
    }
  ));
}

/**
 * Add block data (including global and nested blocks) into the first level of the array
 */
function recursively_add_blocks(&$ret, $blocks) 
{  
  foreach ($blocks as $block) {
    // Global block: add the referenced block instead of this one
    if ($block['attrs']['ref']) {
      $ret = array_merge(
      	$ret,
      	recursively_render_block_core_block($block['attrs'])
      );
    }
    // Normal block: add it directly
    else {
      $ret[] = $block;
    }
    // If it contains nested or grouped blocks, add them too
    if ($block['innerBlocks']) {
      recursively_add_blocks($ret, $block['innerBlocks']);
    }
  }
}

/**
 * Function based on `render_block_core_block`
 */
function recursively_render_block_core_block($attributes) 
{
  if (empty($attributes['ref'])) {
    return [];
  }

  $reusable_block = get_post($attributes['ref']);
  if (!$reusable_block || 'wp_block' !== $reusable_block->post_type) {
    return [];
  }

  if ('publish' !== $reusable_block->post_status || ! empty($reusable_block->post_password)) {
    return [];
  }

  return get_block_data($reusable_block->post_content);
}

[
  {
    "blockName": "core/image",
    "attrs": {
      "id": 70,
      "sizeSlug": "large"
    },
    "innerHTML": "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/sandwich-1024x614.jpg\" alt=\"\" class=\"wp-image-70\"/><figcaption>This is a normal block</figcaption></figure>\n",
    "innerContent": [
      "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/sandwich-1024x614.jpg\" alt=\"\" class=\"wp-image-70\"/><figcaption>This is a normal block</figcaption></figure>\n"
    ]
  },
  {
    "blockName": "core/paragraph",
    "attrs": [],
    "innerHTML": "\n<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</p>\n",
    "innerContent": [
      "\n<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</p>\n"
    ]
  },
  {
    "blockName": "core/columns",
    "attrs": [],
    "innerHTML": "\n<div class=\"wp-block-columns\">\n\n</div>\n",
    "innerContent": [
      "\n<div class=\"wp-block-columns\">",
      null,
      "\n\n",
      null,
      "</div>\n"
    ]
  },
  {
    "blockName": "core/column",
    "attrs": [],
    "innerHTML": "\n<div class=\"wp-block-column\"></div>\n",
    "innerContent": [
      "\n<div class=\"wp-block-column\">",
      null,
      "</div>\n"
    ]
  },
  {
    "blockName": "core/image",
    "attrs": {
      "id": 69,
      "sizeSlug": "large"
    },
    "innerHTML": "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/espresso-1024x614.jpg\" alt=\"\" class=\"wp-image-69\"/></figure>\n",
    "innerContent": [
      "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/espresso-1024x614.jpg\" alt=\"\" class=\"wp-image-69\"/></figure>\n"
    ]
  },
  {
    "blockName": "core/column",
    "attrs": [],
    "innerHTML": "\n<div class=\"wp-block-column\"></div>\n",
    "innerContent": [
      "\n<div class=\"wp-block-column\">",
      null,
      "</div>\n"
    ]
  },
  {
    "blockName": "core/paragraph",
    "attrs": [],
    "innerHTML": "\n<p>This is how I wake up every morning</p>\n",
    "innerContent": [
      "\n<p>This is how I wake up every morning</p>\n"
    ]
  },
  {
    "blockName": "core/group",
    "attrs": [],
    "innerHTML": "\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container\">\n\n</div></div>\n",
    "innerContent": [
      "\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container\">",
      null,
      "\n\n",
      null,
      "</div></div>\n"
    ]
  },
  {
    "blockName": "core/image",
    "attrs": {
      "id": 71,
      "sizeSlug": "large"
    },
    "innerHTML": "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/coffee-1024x614.jpg\" alt=\"\" class=\"wp-image-71\"/><figcaption>First element of the group</figcaption></figure>\n",
    "innerContent": [
      "\n<figure class=\"wp-block-image size-large\"><img src=\"http://localhost/wp-content/uploads/2017/12/coffee-1024x614.jpg\" alt=\"\" class=\"wp-image-71\"/><figcaption>First element of the group</figcaption></figure>\n"
    ]
  },
  {
    "blockName": "core/paragraph",
    "attrs": [],
    "innerHTML": "\n<p>Second element of the group</p>\n",
    "innerContent": [
      "\n<p>Second element of the group</p>\n"
    ]
  }
]

// Define REST endpoint to visualize a post's block data
add_action('rest_api_init', function () {
  register_rest_route('block-metadata/v1', 'data/(?P<post_id>\d+)', [
    'methods'  => 'GET',
    'callback' => 'get_post_blocks'
  ]);
});
function get_post_blocks($request) 
{
  $post = get_post($request['post_id']);
  if (!$post) {
    return new WP_Error('empty_post', 'There is no post with this ID', ['status' => 404]);
  }

  $block_data = get_block_data($post->post_content);
  $response = new WP_REST_Response($block_data);
  $response->set_status(200);
  return $response;
}

/**
 * Process all (Gutenberg) blocks' metadata into a medium-agnostic format from a WordPress post
 */
function get_block_metadata($block_data)
{
  $ret = [];
  foreach ($block_data as $block) {
    $blockMeta = null;
    switch ($block['blockName']) {
      case 'core/paragraph':
        $blockMeta = [
          'content' => trim(strip_html_tags($block['innerHTML'])),
        ];
        break;

      case 'core/image':
        $blockMeta = [];
        // If inserting the image from the Media Manager, it has an ID
        if ($block['attrs']['id'] && $img = wp_get_attachment_image_src($block['attrs']['id'], $block['attrs']['sizeSlug'])) {
          $blockMeta['img'] = [
            'src' => $img[0],
            'width' => $img[1],
            'height' => $img[2],
          ];
        }
        elseif ($src = extract_image_src($block['innerHTML'])) {
          $blockMeta['src'] = $src;
        }
        if ($caption = extract_caption($block['innerHTML'])) {
          $blockMeta['caption'] = $caption;
        }
        if ($linkDestination = $block['attrs']['linkDestination']) {
	        $blockMeta['linkDestination'] = $linkDestination;
	        if ($link = extract_link($block['innerHTML'])) {
	          $blockMeta['link'] = $link;
	        }
	      }
        if ($align = $block['attrs']['align']) {
          $blockMeta['align'] = $align;
        }
        break;

      case 'core-embed/youtube':
        $blockMeta = [
          'url' => $block['attrs']['url'],
        ];
        if ($caption = extract_caption($block['innerHTML'])) {
          $blockMeta['caption'] = $caption;
        }
        break;

      case 'core/heading':
        $matches = [];
        preg_match('/<h([1-6])>(.*?)<\/h([1-6])>/', $block['innerHTML'], $matches);
        $sizes = [
          null,
          'xxl',
          'xl',
          'l',
          'm',
          'sm',
          'xs',
        ];
        $blockMeta = [
          'size' => $sizes[$matches[1]],
          'heading' => $matches[2],
        ];
        break;

      case 'core/gallery':
        $imgs = [];
        foreach ($block['attrs']['ids'] as $img_id) {
          $img = wp_get_attachment_image_src($img_id, 'full');
          $imgs[] = [
            'src' => $img[0],
            'width' => $img[1],
            'height' => $img[2],
          ];
        }
        $blockMeta = [
          'imgs' => $imgs,
        ];
        break;

      case 'core/list':
        $matches = [];
        preg_match_all('/<li>(.*?)<\/li>/', $block['innerHTML'], $matches);
        if ($items = $matches[1]) {
          $blockMeta = [
            'items' => array_map('strip_html_tags', $items),
          ];
        }
        break;

      case 'core/audio':
        $blockMeta = [
          'src' => wp_get_attachment_url($block['attrs']['id']),
        ];
        break;

      case 'core/file':
        $href = $block['attrs']['href'];
        $matches = [];
        preg_match('/<a href="'.str_replace('/', '\/', $href).'">(.*?)<\/a>/', $block['innerHTML'], $matches);
        $blockMeta = [
          'href' => $href,
          'text' => strip_html_tags($matches[1]),
        ];
        break;

      case 'core/video':
        $matches = [];
        preg_match('/<video (autoplay )?(controls )?(loop )?(muted )?(poster="(.*?)" )?src="(.*?)"( playsinline)?><\/video>/', $block['innerHTML'], $matches);
        $blockMeta = [
          'src' => $matches[7],
        ];
        if ($poster = $matches[6]) {
          $blockMeta['poster'] = $poster;
        }
        // Video settings
        $settings = [];
        if ($matches[1]) {
          $settings[] = 'autoplay';
        }
        if ($matches[2]) {
          $settings[] = 'controls';
        }
        if ($matches[3]) {
          $settings[] = 'loop';
        }
        if ($matches[4]) {
          $settings[] = 'muted';
        }
        if ($matches[8]) {
          $settings[] = 'playsinline';
        }
        if ($settings) {
          $blockMeta['settings'] = $settings;
        }
        if ($caption = extract_caption($block['innerHTML'])) {
          $blockMeta['caption'] = $caption;
        }
        break;

      case 'core/code':
        $matches = [];
        preg_match('/<code>(.*?)<\/code>/is', $block['innerHTML'], $matches);
        $blockMeta = [
          'code' => $matches[1],
        ];
        break;

      case 'core/preformatted':
        $matches = [];
        preg_match('/<pre class="wp-block-preformatted">(.*?)<\/pre>/is', $block['innerHTML'], $matches);
        $blockMeta = [
          'text' => strip_html_tags($matches[1]),
        ];
        break;

      case 'core/quote':
      case 'core/pullquote':
        $matches = [];
        $regexes = [
          'core/quote' => '/<blockquote class=\"wp-block-quote\">(.*?)<\/blockquote>/',
          'core/pullquote' => '/<figure class=\"wp-block-pullquote\"><blockquote>(.*?)<\/blockquote><\/figure>/',
        ];
        preg_match($regexes[$block['blockName']], $block['innerHTML'], $matches);
        if ($quoteHTML = $matches[1]) {
          preg_match_all('/<p>(.*?)<\/p>/', $quoteHTML, $matches);
          $blockMeta = [
            'quote' => strip_html_tags(implode('\n', $matches[1])),
          ];
          preg_match('/<cite>(.*?)<\/cite>/', $quoteHTML, $matches);
          if ($cite = $matches[1]) {
            $blockMeta['cite'] = strip_html_tags($cite);
          }
        }
        break;

      case 'core/verse':
        $matches = [];
        preg_match('/<pre class="wp-block-verse">(.*?)<\/pre>/is', $block['innerHTML'], $matches);
        $blockMeta = [
          'text' => strip_html_tags($matches[1]),
        ];
        break;
    }

    if ($blockMeta) {
      $ret[] = [
        'blockName' => $block['blockName'],
        'meta' => $blockMeta,
      ];
    }
  }

  return $ret;
}

function strip_html_tags($content)
{
  return strip_tags($content, '<strong><em>');
}

function extract_caption($innerHTML)
{
  $matches = [];
  preg_match('/<figcaption>(.*?)<\/figcaption>/', $innerHTML, $matches);
  if ($caption = $matches[1]) {
    return strip_html_tags($caption);
  }
  return null;
}

function extract_link($innerHTML)
{
  $matches = [];
  preg_match('/<a href="(.*?)">(.*?)<\/a>/', $innerHTML, $matches);
  if ($link = $matches[1]) {
    return $link;
  }
  return null;
}

function extract_image_src($innerHTML)
{
  $matches = [];
  preg_match('/<img src="(.*?)"/', $innerHTML, $matches);
  if ($src = $matches[1]) {
    return $src;
  }
  return null;
}

[
  {
    "blockName": "core/paragraph",
    "meta": {
      "content": "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Dolor sed viverra ipsum nunc aliquet bibendum enim. In massa tempor nec feugiat. Nunc aliquet bibendum enim facilisis gravida. Nisl nunc mi ipsum faucibus vitae aliquet nec ullamcorper. Amet luctus venenatis lectus magna fringilla. Volutpat maecenas volutpat blandit aliquam etiam erat velit scelerisque in. Egestas egestas fringilla phasellus faucibus scelerisque eleifend. Sagittis orci a scelerisque purus semper eget duis. Nulla pharetra diam sit amet nisl suscipit. Sed adipiscing diam donec adipiscing tristique risus nec feugiat in. Fusce ut placerat orci nulla. Pharetra vel turpis nunc eget lorem dolor. Tristique senectus et netus et malesuada."
    }
  },
  {
    "blockName": "core/image",
    "meta": {
      "src": "https://ps.w.org/gutenberg/assets/banner-1544x500.jpg"
    }
  },
  {
    "blockName": "core/paragraph",
    "meta": {
      "content": "<em>Etiam tempor orci eu lobortis elementum nibh tellus molestie. Neque  egestas congue quisque egestas. Egestas integer eget aliquet nibh  praesent tristique. Vulputate mi sit amet mauris. Sodales neque sodales  ut etiam sit. Dignissim suspendisse in est ante in. Volutpat commodo sed  egestas egestas. Felis donec et odio pellentesque diam. Pharetra vel  turpis nunc eget lorem dolor sed viverra. Porta nibh venenatis cras sed  felis eget. Aliquam ultrices sagittis orci a. Dignissim diam quis enim  lobortis. Aliquet porttitor lacus luctus accumsan. Dignissim convallis  aenean et tortor at risus viverra adipiscing at.</em>"
    }
  },
  {
    "blockName": "core-embed/youtube",
    "meta": {
      "url": "https://www.youtube.com/watch?v=9pT-q0SSYow",
      "caption": "<strong>This is the video caption</strong>"
    }
  },
  {
    "blockName": "core/quote",
    "meta": {
      "quote": "Saramago sonogo\\nEn la lista del longo",
      "cite": "<em>alguno</em>"
    }
  },
  {
    "blockName": "core/image",
    "meta": {
      "src": "https://ps.w.org/gutenberg/assets/banner-1544x500.jpg"
    }
  },
  {
    "blockName": "core/heading",
    "meta": {
      "size": "xl",
      "heading": "Some heading here"
    }
  },
  {
    "blockName": "core/gallery",
    "meta": {
      "imgs": [
        {
          "src": "https://newapi.getpop.org/wp/wp-content/uploads/2019/08/Sample-jpg-image-50kb.jpg",
          "width": 300,
          "height": 300
        },
        {
          "src": "https://newapi.getpop.org/wp/wp-content/uploads/2019/08/setting-rest-fields.png",
          "width": 1738,
          "height": 246
        },
        {
          "src": "https://newapi.getpop.org/wp/wp-content/uploads/2019/08/Sample-jpg-image-100kb.jpg",
          "width": 689,
          "height": 689
        },
        {
          "src": "https://newapi.getpop.org/wp/wp-content/uploads/2019/08/banner-1544x500.jpg",
          "width": 1544,
          "height": 500
        }
      ]
    }
  },
  {
    "blockName": "core/list",
    "meta": {
      "items": [
        "First element",
        "Second element",
        "Third element"
      ]
    }
  },
  {
    "blockName": "core/audio",
    "meta": {
      "src": false
    }
  },
  {
    "blockName": "core/paragraph",
    "meta": {
      "content": "Watch out the contrast!"
    }
  },
  {
    "blockName": "core/file",
    "meta": {
      "href": "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf",
      "text": "Contributor-Day <strong>download</strong> file"
    }
  },
  {
    "blockName": "core/video",
    "meta": {
      "src": "https://www.sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4",
      "settings": [
        "autoplay",
        "muted",
        "playsinline"
      ],
      "caption": "Caption for <em>the</em> video"
    }
  },
  {
    "blockName": "core/code",
    "meta": {
      "code": "function recursive_parse_blocks( $content ) {\n\t$ret = [];\n\t$blocks = parse_blocks( $content );\n\trecursive_add_blocks($ret, $blocks);\n\treturn $ret;\n}"
    }
  },
  {
    "blockName": "core/preformatted",
    "meta": {
      "text": "Some pre-formated text"
    }
  },
  {
    "blockName": "core/pullquote",
    "meta": {
      "quote": "The will to win, the desire to succeed, the urge to reach your full potential… these are the keys that will unlock the door to personal excellence.",
      "cite": "Confucius"
    }
  },
  {
    "blockName": "core/verse",
    "meta": {
      "text": "It is easy to hate and it is difficult to love. This is how the whole scheme of things works. All good things are difficult to achieve; and bad things are very easy to get."
    }
  },
  {
    "blockName": "core/paragraph",
    "meta": {
      "content": "First grouped paragraph"
    }
  },
  {
    "blockName": "core/paragraph",
    "meta": {
      "content": "Second grouped paragraph"
    }
  },
  {
    "blockName": "core/paragraph",
    "meta": {
      "content": "Here is the media header"
    }
  },
  {
    "blockName": "core/paragraph",
    "meta": {
      "content": "And some text"
    }
  }
]