@Override
  protected JSONObject serialize() throws Exception {
    Serializer serializer = new Serializer();
    serializer.reportId = reportId;
    serializer.error = getError();
    serializer.categoryId = categoryId;
    serializer.groupId = groupId;
    serializer.comment = comment;
    String res = Zup.getInstance().getObjectMapper().writeValueAsString(serializer);

    return new JSONObject(res);
  }