{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Historic1920Plates_Extent",
   "layerType": "Feature Layer",
   "minScale": 577790,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "bbced6a0c3064ec52dee9b28c8ceb81b",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAEVJREFUOI1jYaAyYKGZgZs3b/5PqWG+vr6MKC7U09Mj27BLly4xMDDQ0sujBo4aOGrgqIE4DYQVQeQAX19fRhQDYQKUAgDUeAuXNudmLAAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}