How Do I Confirm Handle Message Signature with Electrum?

I discovered this well-known message, which got here from an previous coin holder (2011 tackle, held ~$300M value of BTC in 2017) in a matter of public curiosity.
I want to independently confirm it. How do I try this with Electrum?

Message (2 strains, no further line breaks on the finish):

Handle 16cou7Ht6WjTzuFyDBnht9hmvXytg6XdVT doesn't belong to Satoshi or to Craig Wright.
Craig is a liar and a fraud.

Handle:

16cou7Ht6WjTzuFyDBnht9hmvXytg6XdVT

Signature:

G39S6i4XsfQnixN5ePMjVPboWvGXdnW8xFFAXiwEriZFCclflbD7umP58u3Sl+dvvXC5BxBrRNkTMNf92O1UIXw=