json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "device": {
              "properties": {
                  "name": {
                      "type": "string",
                      "minLength": 4,
                      "maxLength": 255
                  }
              },
              "required": [
                  "name"
              ],
              "additionalProperties": false
          }
      },
      "required": [
          "device"
      ],
      "additionalProperties": false
  }