Second-level JSON response validation in a REST API monitor

In a REST API monitor, I’m using a POST HTTP Method with a JSON request body. In the content match with a JSON response type, can I undertake a second level validation along with first level validation

The REST API monitor does not support second-level JSON response validation. It supports only first level JSON response validation. However, you can check for a specific keyword in the response by using the content check feature (Response type > Text). Know more.