Custom Endpoint: CRUD with API v2 Support?

Is there CRUD support with API V2 in custom endpoints? I get that you can do a LiQL search using API v2, but can you also use API V2 to create, update, and/or delete? Specifically I would like to reproduce the HTTP PUT request in the endpoint to update a user's profile data:

http://community.lithium.com/t5/Developer-Documentation/bd-p/dev-doc-portal?section=commv2&collection=users#action-update

This would help me condense external API calls when updating user information. Thanks!