if you want try with coinig there is my sign message for coinig
Message: I'm AFK from bitcointalk.org asking 0.1 btc loan to lihuajkl repayment is 0.11 btc long terms 14 days
Address: 1AFK5ZEUpi3RYksVjYwWAgrLwGzYrpMDRd
Signature: HG5dGNVEIuC3tVgOlMP8PVBPEuUHvzaCiJNWHNsktYbqJ3jrFR+T4AOgVy/eXLBNcuPA0G6RbdvM6je2Eya+neU=
let you try now