SNMP Custom Traps not showing message in trap body

I was trying to configure a custom trap and I was wondering if there is a way to display the matched_message as Syslog does. The trap is received with the OID specified so it's all fine. I just wanted to confirm if there is a way to also show the message in the trap body. (I'm using OID= .1.3.6.1.4.1.3375.2.4.0.999) Thanks