You need to understand how audit log files and audit messages are formatted before you can use the audit log to gather information about your system and troubleshoot issues.
More information
Audit log file format
The audit log file is found on every Admin Node and contains a collection of individual audit messages.
Audit message format
Audit messages exchanged within the StorageGRID Webscale system include standard information common to all messages and specific content describing the event or activity being reported.