{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.952233,-0.305371,0.000000,0.000000,0.169292,-0.527900,0.832263,0.000000,-0.253623,0.790867,0.556961,0.000000,-1619322.642931,5049502.328569,3532260.496750,1],    "boundingVolume": {    "region": [1.881071,0.590678,1.881179,0.590766,0.000000,8.319746]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/6/20/31_1321761.b3dm"}}}