code: public ApiSuccessResponse subscribeTopic(SubscribeTopicData subscribeTopicData) throws ApiException {
          ApiResponse<ApiSuccessResponse> resp = subscribeTopicWithHttpInfo(subscribeTopicData);
          return resp.getData();
      }
docs: subscribe to receive user events regarding specific topic(s).
  subscribe to receive user events regarding specific topic(s) from interaction server.
  @param subscribeTopicData  (required)
  @return ApiSuccessResponse
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body