Set Owner field using rest api

I am building some short urls for my team, eg constructing a url using the rest api, url encoding it, then shortening it… This allows my team to quickly click a single link to post data to RT.

A real example (except for the domain) which translates to Subject%3A%205%20min%20log Owner%3A%20__CurrentUser__ Queue%3A%20it-concierge

Clicking the url above, successfully creates a new ticket for the logged in user, however it does not set the Owner field to __CurrentUser__

I dont want to manually enter the agents username in the Owner field, as i would then need to create multiple links, i would like to give a single link but use the __CurrentUser__ variable.

Is this possible?