{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.852949,-0.521994,0.000000,0.000000,0.269351,-0.440126,0.856585,0.000000,-0.446329,0.729312,0.518550,0.000000,-2849314.002527,4655844.349191,3288203.968742,1],    "boundingVolume": {    "region": [2.119937,0.545112,2.120029,0.545197,0.000000,45.104900]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/2/1/2_4439.b3dm"}}}