Alright, in that case I managed to fix my wallet in time so here's a signed messaged from it, although it's not in BEGIN BITCOIN SIGNED MESSAGE format because I couldn't get Electrum to generate them that way.
Proof that I own 142eRsdiiteSL6pbBAV2NXRRZuCwz94pYP
IKnnQ1JsAPUk3NfqkT03/n1Kpekgeo8lFV0gaKLlXAM/Lii98FkFS93ubUWMARn0BFMiN7OsivlzoD1HOTNSZes=
Quoted (again) and also
verifiedNote that Electrum won't generate them in that format... just copy paste the "Bitcoin Signed Message" format template from below and fill in the "blanks"
NOTE:
don't include the <'s and >'s!
-----BEGIN BITCOIN SIGNED MESSAGE-----
-----BEGIN SIGNATURE-----
-----END BITCOIN SIGNED MESSAGE-----
So yours would be:
-----BEGIN BITCOIN SIGNED MESSAGE-----
Proof that I own 142eRsdiiteSL6pbBAV2NXRRZuCwz94pYP
-----BEGIN SIGNATURE-----
142eRsdiiteSL6pbBAV2NXRRZuCwz94pYP
IKnnQ1JsAPUk3NfqkT03/n1Kpekgeo8lFV0gaKLlXAM/Lii98FkFS93ubUWMARn0BFMiN7OsivlzoD1HOTNSZes=
-----END BITCOIN SIGNED MESSAGE-----
Also, your "message" is not very 'good'. You should really include your username, the date and the reason for signing the message. I mean, anyone could send that same message to someone else and claim that
they own that address
A better message would be something like:
This is NotATether on Bitcointalk.org, Today is May 13th 2020. Staking my address: 142eRsdiiteSL6pbBAV2NXRRZuCwz94pYP