let a = `Welcome to Kreatorland | NFT Marketplace in Metaverse
Click to sign in and accept the Kreatorland’s
Terms & Conditions: https://opensea.com/terms-and-conditions
Sign in request does not trigger a blockchain transaction or cost any gas fees.
Your authentication status will reset every time you log out.
Account address:
0xb76478dea6757d5e5ed4a3cd67b6a10f744a640d
Nonce:
1150799f-8180-4f24-bd5d-4fc0209e2911`

const signature = await signer.signMessage('123456789');


How to display messages and nonce as whole message on SIGN transaction in metamask. And how to use only nonce for signing instead of whole message including welcome message and nonce.