The audit.log contains user activity information such as when a user logs on to WCC or EEM.
There is an EEM reporting utility that can help display the events in a user friendly format.
It is an additional install performed on the EEM host.
The product will read the audit logs and populate that information into a database.
The EEM reporting client can be run against the database to generate reports.
For more information see:
https://techdocs.broadcom.com/us/en/ca-enterprise-software/intelligent-automation/workload-automation-ae-and-workload-control-center/11-3-6-SP8/release-notes/ca-common-components-release-notes/ca-eem-reporting-utility-an-overview.html
https://techdocs.broadcom.com/us/en/ca-enterprise-software/intelligent-automation/workload-automation-ae-and-workload-control-center/11-3-6-SP8/getting-started/ca-eem-reporting-utility.html