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: [90, 222, 35, 20, 4, 210, 220, 201, 129, 82, 251, 40, 234, 60, 75, 131, 105, 24, 104, 122, 120, 125, 25, 151, 138, 91, 125, 191, 212, 134, 176, 23], witness: NonEmpty(()) }), domain_id: DomainId(0) }