{
 "layers": [
  {
   "layerId": 0,
   "layerName": "Billboards",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "4c0d0acd216280a044a1ffe38e668277",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAABFUlEQVQ4jc3SP0oDQRTH8e/oTHZgk0UIGkkRUFELsRQPkFLtPIEQa4ucJa0HyAUsRGz9g41YCFsZLEyTrMbEjZtEQrAQh+zoJuivmoHHhzfvjWTCkdMGHSD9Q6MDtI1geYfVjMv+4hzKRur34bHOxf0zZ9VzWt/AvS2W5z0OV3J4NmD3HXHtcyxvuKxiAB2J0AonJXGxjFJ8qZ76UowJIxgMICVhRpAMfGrC6S00XqG4Cev58aiMA+8eoHICfn10X1oArRKAroZCFoSAbGYCT94owNEutMPReTjHRGBaw/ZaXNVff5tfg7UGs2GEjBv8Z6IeNFtjwJcOV1JQ8rRd590eBG/4AQRG8KBCbdioXX/m/P+lfAB6cj34MdYXOwAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 1,
   "layerName": "Billboard Buffer",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "48c78dc37bf63042a918ece9ffa3056f",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAYklEQVQ4jWPJy8v7z0BFwAIiHv1T3/D0r+p1SgySZr6tKcd0MwBsIMiw079db1DqOjmYgdQELKMGUgxYKDcCFYwaSDlgoYIZKGDUQMoBOAxBhSOlBsHMABsIKhhBmAoOZAAAAPEWetmSod8AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}