respond: signer=hashkeycloud_mpc.testnet, request=SignatureRequest { tweak: Tweak([224, 52, 82, 92, 213, 47, 146, 255, 115, 49, 189, 252, 248, 210, 215, 207, 62, 206, 27, 172, 86, 224, 35, 172, 22, 147, 57, 103, 209, 34, 113, 119]), payload: Ecdsa(BoundedVec { inner: [50, 64, 65, 176, 39, 222, 114, 115, 188, 94, 71, 206, 106, 96, 252, 172, 241, 112, 203, 77, 3, 226, 151, 162, 207, 134, 30, 237, 214, 11, 239, 143], witness: NonEmpty(()) }), domain_id: DomainId(0) }