{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Truck Routes",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "Primary Route",
     "url": "3ba0b336b3a564f402f397e6c31b556d",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAR0lEQVQ4je3SsQkAIAxE0V/cEm6jk5ttMoYiuIHXxV+lenAQYU4ffE5FwYTuwBqEDrZgOsCE4Z/cII5sm8w9qPU2zmTVKAluAvoKESf7BUYAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Primary"
     ]
    },
    {
     "label": "Secondary Route",
     "url": "57e0e367bc4cf776c8ca8e3bbc16c65a",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASUlEQVQ4jWNhoDJgGTWQYsAyQg38v5rBgRqGMYYyHGABG/afYT81DPy/msGR+l5mDGU4ADKZal5mgDIYRlayoSZgoappDCPSQADQBg4RqNepRAAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Secondary"
     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "route_type"
    }
   ]
  }
 ]
}