Need help with the proper topic for MQTT pushing reportLocation to Owntracks

In my known_devices.yalm the owntracks device looks like this:

owntracks_oleg:
  hide_if_away: false
  icon:
  mac:
  name: owntracks
  picture: /local/oleg.jpg
  track: true

In Owntracks the userid is set to owntracks and device is oleg.

What is the proper topic name for pushing
{"_type": "cmd","action": "reportLocation"}
to OwntTracks?

I tried the following with no success:
owntracks/owntracks/oleg/cmd
owntracks/oleg/owntracks_oleg/cmd
and some others with no success.

I understand that the topic for pushing reportLocation should be in the form:
owntracks/user/device/cmd, but I am not sure how to construct it in my case.

Thank you.

i also tried owntracks/owntracks/oleg/cmd and that is not working either.