json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "CTT Gateway Status Schema",
      "type": "object",
      "properties": {
          "eui": {
              "type": "string"
          },
          "position": {
              "type": "object",
              "properties": {
                  "lat": {
                      "type": "number"
                  },
                  "lon": {
                      "type": "number"
                  }
              },
              "required": [
                  "lat",
                  "lon"
              ]
          },
          "status": {
              "type": "string",
              "enum": [
                  "OK",
                  "UNKNOWN"
              ]
          },
          "lastSeen": {
              "type": "string"
          },
          "maxObservedRange": {
              "type": "integer"
          }
      },
      "required": [
          "eui",
          "position",
          "status",
          "lastSeen",
          "maxObservedRange"
      ]
  }