{
 "layers": [
  {
   "layerId": 0,
   "layerName": "2010 Block Groups",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "49ee323478f01b138eeff934407fb354",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAYklEQVQ4je3VsRGAIBBE0Y9zfUEXtkM7WoU0xjkCBsRLyA8IX3DBYn7jLMzaG3ioFEk6iDipg5USTrLi+UUm/ODCbINyphNzG9SzBcbUBvX6DQ9i2zOlPrADdNI3jhI4PpIXWawSIcnyQMIAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "2010 Census Tracts",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "bf0c56052ddc3972eb9ace8bcda03e8e",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAaElEQVQ4je3UsQ2AMAxE0W/Js2SNsBMMkAEYCtZgGSOiFJiOxB38AZ50zWmaMQLTSMyBApsJOx2JkQ0mB17YsVJ6wLRQsAcYlf7gcDpO+H5wPP0wKEaur9FRuy8P1j9rF/S2++WHTz4BqIIU/ZX+S90AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}