image

image.json

{
  "Main" : {
    "key" : {
      "type" : "Image",
      "fieldset" : "Image",
      "config" : {
        "constraint" : {
          "width" : 300,
          "height" : 300
        },
        "thumbnails" : [ {
          "name" : "Small",
          "width" : 100,
          "height" : 100
        }, {
          "name" : "Medium",
          "width" : 200,
          "height" : 200
        }, {
          "name" : "Large",
          "width" : 300,
          "height" : 300
        } ]
      }
    }
  }
}