Hi @Katya,
im not sure where are you trying to find logs because in Kibana you can use different "languages" to query values.
You can try something like that:
body : '{"id":"123123123","param":"abc"}'
that is exacly what you are talking about.
I'm trying to find all logs which contain "param":"abc".
If you share some screens or information i can help you more.
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