gistfile1.txt

{
  "engine": {
    "type": "menu",
    "config": {
      "layouts": {
        "three_columns": {
          "name": "Three Columns",
          "blocks": ["left_column", "middle_column", "right_column"]
        }
      }
    }
  },
  "has_categories": true,
  "fields": {
    "display_name": "text",
    "bold_item_names": "boolean",
  }
}