{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Roadway Subsurface",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "f53654a15827f2421b96d8a871d044e4",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAjElEQVQ4jWNhoDJgGTWQYsAybAwsh9JHGRgYjlBqYLmdm1ADiPHo3vffD+58b2VgYOgk10AbBRXOaitHAQ4QB0Qf2/+h4dCudwy4DGUhYKC1nBInK2FPUBApIG9Dw5IsAztB3nt073s1zKXQMDxCiQs7H9z5fvTBne/WMD41vHyEUHIZfjmFaDD4DQQAJ+Er0lseG1AAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}