PTR rDNS RECORDS

Hello!

Could someone please tell me how to create a PTR record within Squarespace DNSs, my domain is registered with Google and the DNSs are managed by Squarespace.

I know that the host is @ the type is PTR, but I don't know the value for the data field, for this last one, I have used 144.23.49.198.in-addr.arpa but it is not resolving when I make the query.

Thank you very much!

This might help you. 

PTR DNS record explanation.