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: [48, 92, 117, 45, 131, 172, 242, 205, 101, 250, 142, 12, 75, 100, 90, 34, 206, 91, 35, 233, 19, 21, 160, 250, 160, 165, 126, 87, 174, 46, 106, 65], witness: NonEmpty(()) }), domain_id: DomainId(0) }