{
 "layers": [
  {
   "layerId": 0,
   "layerName": "SideScanSonarTracklines",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "5bde0985adaec37c54343ee145b3b278",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAPElEQVQ4jWNhoDJgGTVw1MDBYuD/1QwODP8YHCgyiYnhAGMowwHauJAxlOEAAwPDAaoZSE0wauCogWQAAPoZByfENfYBAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}