json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "objectIdFieldName": {
              "type": "string"
          },
          "globalIdFieldName": {
              "type": "string"
          },
          "geometryType": {
              "type": "string"
          },
          "spatialReference": {
              "type": "object",
              "properties": {
                  "wkid": {
                      "type": "integer"
                  },
                  "latestWkid": {
                      "type": "integer"
                  },
                  "wkt": {
                      "type": "string"
                  }
              },
              "required": [
                  "wkid",
                  "latestWkid"
              ]
          },
          "fields": {
              "type": "array",
              "items": {}
          },
          "features": {
              "type": "array",
              "items": {}
          }
      },
      "required": [
          "objectIdFieldName",
          "globalIdFieldName",
          "geometryType",
          "spatialReference",
          "fields",
          "features"
      ]
  }