{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949845,-0.312722,0.000000,0.000000,0.115228,-0.349989,0.929640,0.000000,-0.290452,0.882204,0.370613,0.000000,-1853393.745141,5629405.857129,2349077.109970,1],    "boundingVolume": {    "region": [1.888784,0.379578,1.888922,0.379760,0.000000,10.318123]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/8_73212.b3dm"}}}