Track the users that I've shared a page with in a log or other record

When I share a page with one or more users, they receive an email. But there is no record to show with whom I've shared the page or when I shared it. I would like to be able to track shares (who and when) for review purposes. Ideally, I could sort the data by date, page or user, and an administrator could track all shares for the instance.

I added OnDemand to the component list because we are hosted and wil be migrating. So I'd like this to go into that bucket as well.