Zend certified PHP/Magento developer

Configuring rsyslog output format strings

I’m setting up rsyslog for an application and using the following configuration:

$FileCreateMode 0644
if $programname == 'proxy' then /var/log/proxy/log
& stop

This generates log entries like the following:

Feb 26 20:45:46 ip-10-161-71-236 proxy[2562]: Feb 26, 2022 8:45:46 PM org.redisson.connection.pool.ConnectionPool$1 lambda$run$0

This stuff is being shipped over to CloudWatch by CloudWatch Agent, so the part ip-10-161-71-236 proxy[2562] in the log line is not needed. How can I define a format string for the log entry that leaves this out?