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: [168, 111, 161, 199, 14, 232, 92, 202, 197, 134, 67, 0, 28, 192, 170, 211, 122, 90, 88, 166, 162, 51, 106, 58, 205, 90, 147, 182, 48, 173, 125, 93], witness: NonEmpty(()) }), domain_id: DomainId(0) }