Quoted and verified using tools.bitcoin.com and electrum. When i tried with coinig it turns out to be a bad message though, not sure what is wrong.
It's simple. Coinig sucks and you should stop using it.
This is a heavily cut down version of Shorena's How To Sign a message with only the relevant stuff and links back to her original post.
As you can see coinig is crossed out.
If you write a post/PM it should look like on the picture below:

and for everyone else reading, it looks like this:
-----BEGIN BITCOIN SIGNED MESSAGE-----
-----BEGIN SIGNATURE-----
-----END BITCOIN SIGNED MESSAGE-----
I added an example how to post the signed message for the blockchain.info part
here.
Hello, please quote and verify.
----BITCOIN ADRESS ----
16jR6dL3tNqZ4fs3thW7m8XdzZLzBeKuQx
-----BEGIN BITCOIN SIGNED MESSAGE---
I am sashagwmlk and I own this Account.30.01.2018
---BEGIN SIGNATURE---
H6vGV0tu5yol1oqdNlTKRTm01P/P7XIdz7yb+NH86ih9KkyJnHKcDIg7f4BmhdgOmoJFUteZsZDx2/E9Qw/NLvU=
Thank you!
Message Quoted and archived
http://archive.is/gYUTS#selection-4341.0-4355.88