If you want to temporarily switch on fuller logging, such as Data Returned by Server, surround your action statement with the following statements

 lr_set_debug_message(LR_MSG_CLASS_EXTENDED_LOG |
  LR_MSG_CLASS_FULL_TRACE |
  LR_MSG_CLASS_RESULT_DATA, LR_SWITCH_ON);

  ---> Statement here

 lr_set_debug_message(LR_MSG_CLASS_EXTENDED_LOG |
  LR_MSG_CLASS_FULL_TRACE |
  LR_MSG_CLASS_RESULT_DATA, LR_SWITCH_OFF);