{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Billboards",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "5b08d44a7946899a8267fe0af7022770",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAF5JREFUOI1jYaAyYBk1cAgZuJ2hZ64Ug+gfbHKP2Z/f9/lZ0UGSgdoMyr6yDGKi2ORYGVg3kOxCcsGogTQ08DnDWxYmBkascm9/fuQm2UBzhhQhkpxGyEBywaiBlAMAXu8PWKRpFy4AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}