SUMA API - system search using DeviceId

Hi everyone,
I’m having some troubles using the SUMA API, my problem is with one simple endpoint, system.search.
I can find devices using all of the methods except for one, the deviceID
For example, using the IP Address I get the devices I’m looking for, the URL for call is the following:
https://mySUSEManager.com/rhn/manager/api/system/search/ip?searchTerm=IP_ADDRESS
The same for hostname and uuid, no problems, but when I try to look for a device using the device ID I always get an empty list, maybe I’m using the wrong one? I use the one that is listed in the web interface as “SUSE Manager System ID” which is the same I get as response when I look for the devices using any other search term.
The URL for the call is the following:
https://mySUSEManager.com/rhn/manager/api/system/search/deviceId?searchTerm=DEVICE_ID
Am I doing something wrong?