simple-document.js

{
  "type": "doc",
  "content": [
    {
      "type": "paragraph",
      "content": [
        {
          "type": "text",
          "marks": [
            { "type": "em" },
            { "type": "strong" }
          ],
          "text": "This is bold and italic"
        },
        {
          "type": "text",
          "text": " and this is not."
        }
      ]
    }
  ]
}