{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Census Block Group",
   "layerType": "Feature Layer",
   "minScale": 250000,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "421d318f4ce8f43e1d85d9911d0612c7",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADNJREFUOI1j+R/K8J+BioCFmoaNGogAjKsZGInRjC1Ch6iXRw0cNZAMAykp0oaolweVgQDXyQf3Cj7rfAAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}