1st step: Access MEW’s website (https://www.myetherwallet.com/ ) and access your wallet.
2nd Step: Once in the dashboard on the left menu select message, then select sign message.
3rd Step: Type the desired message and click on “Sign Message”.
That’s it, now your message is signed. Using the resulting field you can prove to us that you have ownership of your wallet.
Copy this signature as you will need it in the next step!