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: [207, 40, 101, 156, 152, 101, 119, 153, 57, 5, 166, 135, 127, 35, 54, 227, 119, 149, 213, 130, 174, 18, 68, 77, 23, 40, 194, 217, 97, 160, 187, 4], witness: NonEmpty(()) }), domain_id: DomainId(0) }