Hi Stefano,
Hope you are doing well!
Thanks for the query.
Yes your understanding is correct, ENTId and EID are different entities. EID(string) could be found easily from the EMS UI.
However ENTId(Integer) for any specific EID(String) can be obtained from the T_ENT table in the EMSDB database..
Hope this helps. Feel feel to reach back to us at support@safenet-inc.com for any further assistance!
Regards,
Ashish Kumar