{
  "type": "doc",
  "content": [
    {
      "type": "columns",
      "attrs": { "layout": "two", "widthMode": "normal" },
      "content": [
        { "type": "column", "attrs": { "width": 50 }, "content": [
          { "type": "paragraph", "content": [{ "type": "text", "text": "Left column." }] }
        ]},
        { "type": "column", "attrs": { "width": 50 }, "content": [
          { "type": "paragraph", "content": [{ "type": "text", "text": "Right column." }] }
        ]}
      ]
    }
  ]
}