Hi Medhi
Many thanks for your advice. It's great and useful!
However, I encountered an error when I execute:
https://xxxx.crm.dynamics.com/api/data/v9.2/audits(auditid GUID)/Microsoft.Dynamics.CRM.RetrieveAuditDetails()
"Object reference not set to an instance of an object."

I don't understand what could have caused it since I have the audit record when I execute:
https://xxxx.crm.dynamics.com/api/data/v9.2/audits(auditid GUID)

And I can see the data via the Audit Summary View:

Would you have any experience regarding this too?
Thanks in advance!