respond: signer=mpch-01.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: [81, 122, 147, 222, 136, 155, 178, 56, 70, 128, 49, 8, 172, 189, 72, 152, 89, 33, 191, 179, 140, 76, 252, 122, 229, 89, 18, 29, 27, 248, 244, 113], witness: NonEmpty(()) }), domain_id: DomainId(0) }