respond: signer=stakin-mpc2.testnet, request=SignatureRequest { tweak: Tweak([219, 168, 68, 128, 219, 92, 120, 51, 228, 10, 113, 57, 202, 242, 53, 98, 58, 18, 212, 95, 163, 11, 30, 1, 27, 145, 164, 100, 243, 254, 131, 159]), payload: Ecdsa(BoundedVec { inner: [27, 42, 101, 177, 93, 194, 105, 107, 35, 190, 128, 146, 101, 83, 35, 179, 168, 197, 139, 111, 167, 48, 171, 196, 246, 42, 243, 154, 60, 2, 50, 70], witness: NonEmpty(()) }), domain_id: DomainId(0) }