{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Census Tracts 1990",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "43e684b9f4fd7d4346e0a5c1f51b1ff8",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAHJJREFUOI1jYaAyYIExcnJyGigxaMqUKQ1wA3Nychrs5U3qZYUkyTLs0tMbDDk5OQxTpkxpgLtQVkiSwVxRn2wXXnp1mwHuQmqCUQNHDRw1cJgZeOnpDbINefzuOaqBU6ZMacjJyYEXQeQAlAIWWYBSAABvKyC5rzHALgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}