analyze traffic to a specific website

One of our servers is sending out a bunch of calls to a specific ip address. I know it is via https and I know the call is getUserAccount. I have captured packets via wireshark on all of the suspected servers but my question is:

How do I / What is the most efficient way to find the specific info my server is sending to this particular IP?

I have filtered by ssl and analyzed ssl stream but it still looks unintelligable.

Thanks!