{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950515,-0.310679,0.000000,0.000000,0.173760,-0.531615,0.828971,0.000000,-0.257001,0.786288,0.561874,0.000000,-1640921.039250,5020359.664478,3563483.917286,1],    "boundingVolume": {    "region": [1.886655,0.596600,1.886752,0.596698,0.000000,15.223519]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/7/6_1393861.b3dm"}}}