fields.json

{
  "translatableOptions": [
    {
      "label": "Some wpml option",
      "type": "text",
      "name": "someWpmlOption"
    }
  ],
  "globalOptions": [
    {
      "label": "Some global option",
      "type": "text",
      "name": "someGlobalOption"
    }
  ],
  "layout": {
    "name": "blockPost",
    "label": "Block Post",
    "sub_fields": [
      {
        "label": "Show post content",
        "type": "true_false",
        "name": "showPostContent",
      },
      {
        "label": "Post prefix",
        "type": "text",
        "name": "postPrefix",
        "required": 1,
        "default_value": "News: "
      }
    ]
  }
}