Demo mode: any non-empty signature is accepted. Replace with real Verus signer later.
ODINID: @demo#main
Challenge: mxmHaEn_Aa40y1GqBv7Bkw
Nonce: 2tf6oKm-nFBYgqa9XVKPEqjy114uHPug
Expires in: 300s
Scan the QR with your ODINID signer to produce a signature for the nonce.