{ "layerEstimates": [ { "extent": { "ymin": -1617182.7729999982, "xmin": -19951914.9256, "ymax": 11554348.2474, "xmax": 20021886.4032, "spatialReference": { "latestWkid": 3857, "wkid": 102100 } }, "layerId": 0, "count": 1495 } ] }