Keccak256 message hash (THIS IS NOT A PAYMENT ADDRESS)
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496eec763e227c7f6e5cc0399bc35c03146a986bbc9e2bed6bcd518679ed888f

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TO VERIFY:

$ echo -n '...' | cast keccak

Or use online Keccak256 tool: https://gchq.github.io/CyberChef/#recipe=Keccak('256')

You should have received the message contents '...' in a separate communication.