I’ve noticed it’s a really old post only after writing my solution, but it’s still unanswered so here goes 
I have created a simple logging logging function to record time, type of log and additional data (basically a string) using [this][1] JSON plugin (Only using its “Write String To File” function though, so if you have an alternative to saving files it wont matter)
In my case it’s set to get and stamp the time since begin play but you can set it to stamp the local time too.
once you have this function, just use it whenever you wish to log an action.
The attached example prompts this log:
<0:0:13:374><PMT> {"amnt1":0,"amnt2":200}
