json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "time": {
              "type": "string",
              "format": "date-time"
          },
          "relayId": {
              "type": "string"
          },
          "data": {
              "type": "object",
              "patternProperties": {
                  "^[0-9a-zA-Z_-]{1,255}$": {
                      "type": [
                          "number",
                          "string",
                          "boolean"
                      ]
                  }
              },
              "additionalProperties": false
          }
      },
      "required": [
          "data"
      ],
      "additionalProperties": false
  }