code: public JsonResponse scheduleBlastFromBlast(Integer blastId, Date scheduleTime, Blast blast) throws IOException {
          blast.setCopyBlast(blastId);
          blast.setScheduleTime(scheduleTime);
          return apiPost(blast);
      }
docs: Schedule a mass mail blast from previous blast
  @param blastId blast ID
  @param scheduleTime schedule time for the blast
  @param blast Blast object
  @return JsonResponse
  @throws IOException