Possible to create a template that mixes json and text log output?

[iTerminate]

Great utility! I use it to parse json output out of mosquitto_sub. The issue is I want to display the topic as well. Here is a sample output from mosuitto_sub:

app/add {"description":"Add action completed","entityName":"Item","entityId":252}

Is it possible to create a template that will extract the json and the topic that precedes the json message?

[iTerminate]

I found a solution using sed
mosquitto_sub -v -t "app/#" | sed -u 's/^\([^ ]*\) {\(.*\)}/{"topic":"\1",\2}/' | loggo stream

This converts the output to full json