{
 "layerEstimates": [
  {
   "extent": {
    "ymin": 1510568.5447000004,
    "xmin": -17776872.6542,
    "ymax": 8549683.354900002,
    "xmax": 16209752.519100003,
    "spatialReference": {
     "latestWkid": 3857,
     "wkid": 102100
    }
   },
   "layerId": 0,
   "count": 679
  }
 ]
}