JSON mask for the "about" content type in the front-end-only example

about.json

{
  "Main" : {
    "title" : {
      "fieldset" : "Slide's title",
      "type" : "StructuredText",
      "config" : {
        "single" : "heading1"
      }
    },
    "lede" : {
      "fieldset" : "Slide's lede",
      "type" : "StructuredText",
      "config" : {
        "single" : "paragraph,strong,em"
      }
    },
    "img0" : {
      "fieldset" : "Image #1",
      "type" : "Image"
    },
    "device" : {
      "fieldset" : "Type of device around the image",
      "type" : "Select",
      "config" : {
        "options" : [ "imac", "ipad" ]
      }
    }
  }
}