Using Deluge scripting to create/update data in TabularSections

I am having following Form structure with some other usual fields, and a tabular section which allows putting question, self rating and lead rating. (pic below)

I am trying to create a record of this form via Deluge, but can't figure out way to populate records in Tabular Sections. Following is my sample code

updatedPerfReview = Map();
diffsNew = List();
diffsNew.add({"Lead_Client_Rating":"4","Question":"Is Skilled For Job?","Self_Rating1":"5"});
tabSecs = Map();
// Difference is the Tabular Section heading, which is coming back in JSON as well
tabSecs.put("Differences", diffsNew);
updatedPerfReview.put("tabularSections", tabSecs);
info zoho.people.create("Performance_Review", updatedPerfReview);

Any help appreciated here.

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