{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.948889,-0.315609,0.000000,0.000000,0.116690,-0.350831,0.929140,0.000000,-0.292975,0.880837,0.371876,0.000000,-1869498.545003,5620702.048014,2357089.622956,1],    "boundingVolume": {    "region": [1.891811,0.380924,1.891979,0.381135,0.000000,6.643498]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/2/8_72514.b3dm"}}}