{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950545,-0.310586,0.000000,0.000000,0.173685,-0.531561,0.829021,0.000000,-0.256940,0.786361,0.561799,0.000000,-1640531.192242,5020826.113917,3563009.399123,1],    "boundingVolume": {    "region": [1.886557,0.596509,1.886655,0.596608,0.000000,12.476542]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/6_1391020.b3dm"}}}