{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Roads-500K-75K",
   "layerType": "Feature Layer",
   "minScale": 500000,
   "maxScale": 75001,
   "legend": [
    {
     "label": "Ministry Roads",
     "url": "5b1c9bbb11984522c46e3781b74d44c6",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAVUlEQVQ4jWNhoDJgGTWQYsAyAg28OmeOCgszsyA1DPvz9+9dFpBh//7/r6WGgSzMzM3U9/IfkDOZmZupYdgfkFnaKSnvGBgYQHikJBuGUQMpBVQPQwBrYBWTw8jnSgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "8"
     ]
    },
    {
     "label": "Major Roads",
     "url": "91d656435443c8aefd04d9668d6de72a",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAUklEQVQ4jWNhoDJgGTWQYsAyAg38eKxChYWFVZAahv35w3yXBWLY31pqGMjCwtBMfS//ATuToZkahv0BmcVv1fCOgYEBhEdKsmEYNZBSQPUwBADy1hCdKvEmigAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "7",
      "1",
      "9"
     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}