How can I know who did a entitlements delete?

Hello,

On the web portal, if I access an employee's history panel, I can have "Entitlement Removed" and "Entitlement Added". 

Now if I click on it, I can't tell who deleted or added it. I see "QBM_PDBQueueProcess 1", QBM_PDBQueueProcess 4,... How can you see the user?

Greetings.