Signed message:
MESSAGE: CYBERCOWBOYWANTSMONEYBACK
SIGNATURE: IDxFxp7LWaAV/23t/G4BYzM7m54Z2HiWomJ3qFBmAiC7MpDUe6P/QXAy3om0U2zleQCYRuKbUYvmXrOqtLXKiQk=
WALLET: bc1qx63eg9egx7qwaw4pwr25zzu9sxp8u03n5hknam
I have tried to verify this message and have not been able to. Apart from the fact that you are not using the address from which you sent him the loan funds, which was the following:
bc1qey20t2zdpgf90rqp80zg09reuxrwuq0ca8z60w
He was asked to sign a message for the originally posted address, the one sakanwa also quoted.
Also, the signature works.

With all the Sakanwa/Obari drama brewing it seems it's gonna be a loan default anyway.