How to read parameters in MS fabric notebook, passed as request body from an API call

Question

I am running a microsoft fabric notebook on demand from my c# code , via fabcric POST API call. My note book requires 3 parameters that I need to pass as a Json body to this POST API. Below is the sample request.

{

"FirstName":"John", "LastName":"Smith", "LoginDate":"2/7/2025"

}

Now in notebook cell, how can I get all these 3 fields and print it. Looking for something like below - enter image description here