Create an empty run (without steps)

Is there any possibility in ALM 11/12 to create a run without any run steps from the coresponding test via the RESTful API?

When we use the OTA-API, the RunFactory creates empty runs, where we can add certain run steps. We need to reproduce same functionality with the RESTful API. Deleting the contained "default" run steps is not a way for us, because not every user has sufficient permissions.

Thanks a lot!