{
  "type": "object",
  "properties": {
    "order_id": {
      "type": "string"
    },
    "amount": {
      "type": ["string", "number"],
      "pattern": "^\\d+(\\.\\d{1,2})?$",
      "errorMessage": {
        "pattern": "Amount should be a number with maximum 2 decimal places"
      }
    }
  },
  "required": ["order_id"],
  "additionalProperties": true,
  "errorMessage": {
    "properties": {
      "order_id": "Order is invalid"
    }
  }
}