{
 "layers": [
  {
   "layerId": 0,
   "layerName": "centerline",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "990df6fe5f3dc63f6c5726c5d909bf67",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAcklEQVQ4jWNhoDJgGTVwJBm4f/90B0oNc3TMPMCyf//MBgEByXpKDWNgYGDYv39mI4uAgGS9np43NcxjuHRpaz31w/DDh+eNly5tpYqXP3x43sji6JjesH//9AOUGubomHmAgQEayzAONcAQStijBpINAP5EH2tWkcW7AAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}