{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "topic": {
      "type": "string",
      "minLength": 1,
      "maxLength": 230
    },
    "message": {
      "type": "string",
      "maxLength": 32767
    }
  },
  "required": [
    "topic",
    "message"
  ],
  "additionalProperties": false
}