json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "3D data upload",
      "type": "object",
      "properties": {
          "vertices": {
              "type": "array",
              "items": {
                  "type": "array",
                  "maxItems": 3,
                  "minItems": 3,
                  "items": {
                      "type": "number"
                  }
              }
          },
          "facets": {
              "type": "array",
              "items": {
                  "type": "array",
                  "maxItems": 3,
                  "minItems": 3,
                  "items": {
                      "type": "integer"
                  }
              }
          },
          "camera": {
              "type": "object",
              "properties": {
                  "x": {
                      "type": "number"
                  },
                  "y": {
                      "type": "number"
                  },
                  "z": {
                      "type": "number"
                  }
              },
              "additionalProperties": false,
              "required": [
                  "x",
                  "y",
                  "z"
              ]
          }
      },
      "additionalProperties": false,
      "required": [
          "vertices",
          "facets",
          "camera"
      ]
  }