{
 "layers": [
  {
   "layerId": 0,
   "layerName": "hydrology",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "20def94abec77c6c7d96cb4d708d2808",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAC9JREFUOI1jYaAyYKGdgfn//1Nk0kRGRlQDqQRGDRw1cNTAUQPpbSC0PKOegVQCADivA+RJ7K+pAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    }
   ]
  }
 ]
}