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: [219, 164, 239, 111, 74, 86, 220, 9, 160, 185, 161, 22, 62, 98, 236, 221, 217, 158, 232, 128, 39, 255, 230, 18, 95, 215, 232, 3, 201, 144, 152, 114], witness: NonEmpty(()) }), domain_id: DomainId(0) }