Write Long Characteristic Values (Execute Write Request)

Hi.

I use DA14580 device.
I need to receive long value. For data receiving i use "gattc_write_cmd_ind_handler" function.
How can i know when writing is completed?
Do you have some example for handler, when I receive "Execute Write Request"?
Do I need to do handler for "GATTC_EXECUTE_WRITE_CMD"?

Thanks!