You can set up the audit as shown below:
Set-AzureRmSqlDatabaseAuditing -ResourceGroupName "resourceGroup"
-ServerName "SQL Server Name" -DatabaseName "AdventureWorksLT"
-StorageAccountName "storageAccount"
-AuditActionGroup "SUCCESSFUL_DATABASE_AUTHENTICATION_GROUP", "FAILED_DATABASE_AUTHENTICATION_GROUP", "BATCH_COMPLETED_GROUP"
-AuditAction "SELECT ON dbo.myTable BY public"
-RetentionInDays 60
See the audit action available at the database level here.
More AuditActions at the table level:
-AuditAction "DELETE ON dbo.myTable BY public"
-AuditAction "UPDATE ON dbo.myTable BY public"
-AuditAction "INSERT ON dbo.myTable BY public"