{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.948744,-0.316045,0.000000,0.000000,0.176486,-0.529800,0.829557,0.000000,-0.261626,0.785383,0.561004,0.000000,-1670448.349750,5014565.653694,3557955.815206,1],    "boundingVolume": {    "region": [1.892306,0.595486,1.892402,0.595709,0.000000,7.856143]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/8/15_1070773.b3dm"}}}