Cool, you’re going the hard way, voluntarily 
If you want to use JSON you have to choose JSON as provider, you can see in JSON Quote Feed Provider - Portfolio Performance Manual
The macros are not described already in english, but in german Kursdaten laden - Portfolio Performance Handbuch
https://etelection.indiatimes.com/ET_Charts/delaycharts?scripcode=AAVASEQ&exchangeid=50&datatype=eod&filtertype=eod&tagId=35834&firstreceivedataid=2024-02-07&lastreceivedataid=&directions=back&scripcodetype=company&uptodataid=&period=6m
In this example-URL (it is Aavas Financiers Limited:INR, what a coincidence), which is good for a browser but not good for PP, you maybe want to use the ticker-macro and the date-macro.
scripcode=AAVASEQ => scripcode={TICKER} (if you have changed the symbol AAVAS.NS to AAVASEQ)
firstreceivedataid=2024-02-07 => firstreceivedataid={TODAY}
How to find the correct JSON-Path is described here Automatically import quotes of funds - #14 by ProgFriese