{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Bridges",
   "layerType": "Feature Layer",
   "minScale": 100000,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "4b1923403a54450298da8803726ed4ed",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAE9JREFUOI1jYaAyYBk1cNTAwWTg/0v/oxn1GJfiY5NkIKMu4xKG/wxLGBgYGBgZGBkw2IwMjHBd/xn+M8AlcRiITRInwKN2CEXKqIHD2EAAWsUUF+HNFkoAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}