Ok, I finally made it 
Code:
-----BEGIN BITCOIN SIGNED MESSAGE-----
I'm geppettobtc from bitcointalk.org. Today is 10/24/19 and this is my address.
-----BEGIN SIGNATURE-----
191bX2Kv8yAsi1NrJEsu1Jonsij4fiB2G8
H20qC8kHDsWTR1U67vQrImVdjOcpeoyCJ7bLNCif8fQ7PHSJJeyG5S+nT3z6kcZ6LGwf2co34daG4XNqPUYEVSs=
-----END BITCOIN SIGNED MESSAGE-----
I'm geppettobtc from bitcointalk.org. Today is 10/24/19 and this is my address.
-----BEGIN SIGNATURE-----
191bX2Kv8yAsi1NrJEsu1Jonsij4fiB2G8
H20qC8kHDsWTR1U67vQrImVdjOcpeoyCJ7bLNCif8fQ7PHSJJeyG5S+nT3z6kcZ6LGwf2co34daG4XNqPUYEVSs=
-----END BITCOIN SIGNED MESSAGE-----