It's a bit bleeding edge... and you need to use your nsec to decode them as Nostr doesn't specify signers can create schnorr signatures outside of events.

Paste into Nostrly Cashu Redeem (either online or the standalone version) to check you copied emoji out ok - sometimes Primal can break them at the see more... so generally best to copy the entire note.

If the token reads ok, you can enter your nsec and a lightning address to redeem it to.

Cashu.me wallet will shortly allow redemption straight to Cashu wallet.