{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950356,-0.311164,0.000000,0.000000,0.173858,-0.530997,0.829347,0.000000,-0.257520,0.786516,0.561316,0.000000,-1644233.002640,5021805.410125,3559942.265139,1],    "boundingVolume": {    "region": [1.887165,0.595917,1.887264,0.596034,0.000000,8.806958]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/15_1342769.b3dm"}}}