Session Event Action to modify/transfer host via triggers and/or api

It would be great to have a QueuedModifyHost event to be able to update the session's host. I would like to be able to do so by utilizing a CustomProperty I set on sessions I create via the RESTful API Manager extension. 

Additionally adding support via a new API function to change the host on a session, or being able to set it upon creation would all be welcome features, as right now created sessions via the RESTful API Manager extension default to the username specified for the extension.