There is SLIP-39 (20 words) on top and everything else is derived from it. (nsec, cashu, evolu, …) But you can override this derived nsec with different one and then manage related nostr identity in Linky. (I use it that way) https://image.nostr.build/826616f4b1cf96ffbb1fadd6ac1a04e9993c689eb9a4...

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