{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Major Roads",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "Interstate",
     "url": "4e97ad0c48562ae9e54fd96ce6ab78ec",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAL0lEQVQ4jWNhoDJgGTVw1EAyDPw/0/g/VQ2kpmFDxEDG9LOMVDWQmoaNGjhSDAQArpYEUctS6tYAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "I"
     ]
    },
    {
     "label": "US Highway",
     "url": "5a6f712c4712d7fa516f799224e89233",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAP0lEQVQ4jWNhoDJgGTVw1EAyDfy/K/k/NQxjdJvLyEItwxgYIA6jvpcZ3eYyUtXLMAY1DGRgGDLJZtTAwWUgAFx3EFHCCinwAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "US"
     ]
    },
    {
     "label": "US Alternate",
     "url": "0c08d404cbfc1a04689195bfc5dec481",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAP0lEQVQ4jWNhoDJgGTVw1EAyDfx/uf4/NQxj1G1kZKGWYQwMEIdR38uMuo2MVPUyjEENAxkYhkyyGTVwcBkIAL84EFHnTKFiAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "AL"
     ]
    },
    {
     "label": "Business Route",
     "url": "be2bd555e29253dee86866f8d25d6212",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAP0lEQVQ4jWNhoDJgGTVw1EAyDfz0qu0/NQzjE6tiZKGWYQwMEIdR38t8YlWMVPUyjEENAxkYhkyyGTVwcBkIAN7lEFH2JHgmAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "BR"
     ]
    },
    {
     "label": "Maryland",
     "url": "7dc20f549a1a675c3552d17abe871282",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAP0lEQVQ4jWNhoDJgGTVw1EAyDfz/ev1/ahjGKBrIyEItwxgYIA6jvpcZRQMZqeplGIMaBjIwDJlkM2rg4DIQAEVvEFGlaufXAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "MD"
     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Route Type"
    }
   ]
  }
 ]
}