{
 "layers": [
  {
   "layerId": 2,
   "layerName": "Street Centerlines",
   "layerType": "Feature Layer",
   "minScale": 500000,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "3d30f9a023da4b4cf93c81c25e8bcdcb",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAPklEQVQ4jWNhoDJgGTVw1MDBYqCxsbENMzOzNSUG/f379+jZs2eP0MaFZ8+ePcLAwHCEagZSE4waOGogGQAA6QwMQIrKSgAAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}