@meeraehamza I'm showing your account is currently set up with the free service.
The ability to add specific songs to your collection is only possible when:
- Signing up for a paid subscription to Pandora Premium
- Initiating free sessions of Pandora Premium by watching an ad
To clarify, are you currently paying for a subscription to Pandora Premium on an account registered under a different email address?
Or were you collecting those songs while in free sessions of Pandora Prermium?
Let me know.