Hi,
I can put together a system for you that will save the data from gameobjects as a binary file, alongside any other data you may need saved, in a way that would be easy for you to expand upon in future if you want to change what exactly you're saving.
I've spent the better half of the last year working on a very similar problem for a research-grade app, having to deal with issues such as privacy protection and data validation, so this wouldn't take me more than a few hours to put together for you
Tom
P.S. Apologies for the rather sparse bio and lack of recommendations, I'm fairly new on this site and haven't had much time to use it since creating my account last year