{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Blocks",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "11b35f85ce892dd83ca60f6e3593aee7",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASklEQVQ4jWMpLCzazsTI5MBABfDv/78DLEyMTA5FwR0c1DCwb22FAws1DEIGowaOGjhq4KiBowZCDfz3/9+BvrUVDtQw7N//fwcAnNETUrUmOCMAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "Block Groups",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "2a758afb35677dee424f34bf83e86596",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAS0lEQVQ4jWMpLMrfzsjE5MBABfD/378DLIxMTA7hHa4c1DBwZcVuBxZqGIQMRg0cNXDUwFEDRw2EGvj/378DKyt2O1DDsP///h0AAJCEE3n8IT7LAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 2,
   "layerName": "Tracts",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "14ca24d96d1a6db591461ce5033eb322",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAS0lEQVQ4jWMpyi/czsTE5MBABfDv378DLExMTA4dXtkc1DCwYttUBxZqGIQMRg0cNXDUwFEDRw2EGvjv378DFdumOlDDsH///h0AAJYjE1+T9B3yAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}