I'm migrating from legacy address (unused now) to SegWit Bech32 address.
Legacy address (my old address) :
-----BEGIN BITCOIN SIGNED MESSAGE-----
This is ETFbitcoin from bitcointalk.org, today is December 29, 2017, 07:20:06 PM. I'm moving my main address from 1ETFbQLAhkTMcBFWALeZKVtx7mkGjRgPpE to bc1q4w024sesxqwusxf3g8nwm3jp29umpcxx2fhwse
-----BEGIN BITCOIN SIGNATURE-----
1ETFbQLAhkTMcBFWALeZKVtx7mkGjRgPpE
HOEh+YkvA2JSS7jlEN5+VbreKdP2LW4hmEJ1+Ipq/C7vaKqXX7B7r8L5bIo6PaRojrNSunAnop34XtZtZc9+D6I=
-----END BITCOIN SIGNATURE-----
SegWit Bech32 address (my new address) :
-----BEGIN BITCOIN SIGNED MESSAGE-----
This is ETFbitcoin from bitcointalk.org, today is December 29, 2017, 07:20:06 PM. This message is signed with SegWit Bech32 address.
-----BEGIN BITCOIN SIGNATURE-----
bc1q4w024sesxqwusxf3g8nwm3jp29umpcxx2fhwse
IIKx8dhr+7qg7XIKzOyFZuvDezj2TekZIKH13vG6IKQvTfqa94ZQi2EEjem34wV0SGnIqQi+zWeI8vv9lLoUlnw=
-----END BITCOIN SIGNATURE-----
Quoted and verified using Electrum.