----BEGIN BITCOIN SIGNED MESSAGE-----
I am eR4. I can sign a message.
-----BEGIN SIGNATURE-----
Version: Bitcoin-qt (1.0)
Address: bc1qnrjqf5j2nwnu6atz09v5r3z02l95a7w0vrcgy8
IG66vK/llZNLZYihm6MDX/oxScbE1OK+z1P099PxmBLrD7XND3CxEDgWYx45SCCu/vxcfpgVapU7Z8ioB4Mn7U4=
-----END BITCOIN SIGNED MESSAGE-----