meshes.json

{
    "meshes" : {
        "mesh_id": {
            "name": "user-defined name of mesh",
            "primitives": [
                {
                    "attributes": {
                        "NORMAL": "accessor_id0",
                        "POSITION": "accessor_id1",
                        "TEXCOORD_0": "accessor_id2"
                    },
                    "indices": "accessor_id3",
                    "material": "material_id",
                    "mode": 4,
		            "extensions" : {
		               "extension_name" : {
		                  "extension specific" : "value"
		               }
		            },
                    "extras" : {
                        "Application specific" : "The extra object can contain any properties."
                    }     
                }
            ],
            "extensions" : {
               "extension_name" : {
                  "extension specific" : "value"
               }
            },
            "extras" : {
                "Application specific" : "The extra object can contain any properties."
            }     
        }
    }
}