CATS0006 user exit

Friends,

I am using CATS0006 user exit for some custom code. In this enhancement I would like to access CAT2 time entry user pernr and and his action from PA0000-massn, so that I can compare that pernr latest massn and according to that I can do my code.

I am not sure what structure should i use to get the pernr and massn , any help would be great help.

Thanks

Krish