{
  "type": "object",
  "properties": {
    "topic": {
      "type": "string",
      "example": "Happy Birthday"
    },
    "minimum_lines": {
      "type": "integer",
      "example": 0
    },
    "maximum_lines": {
      "type": "integer",
      "example": 0
    },
    "per_line_minimum_character": {
      "type": "integer",
      "example": 0
    },
    "per_line_maximum_character": {
      "type": "integer",
      "example": 0
    }
  },
  "required": ["topic"]
}