How to expose Profile2 fields in Services? Is there a good solution to CRUD a user's Profile2 fields via Services? I assume this can be done with Services Entity API, but I wonder if there is a more direct integration?

With Services Entity API, I enabled the entity_profile2 resource and can load an index of profiles. I need to disable the ability to index the profiles but allow a user to retrieve their own profile.

From the docs, this URL should be able to find user with uid=296's profile:

api/entity_profile2.json?parameters[uid]=296

But the result is an empty page.
I found that I had to use pid: /api/entity_profile2?parameters[pid]=1