https://www.reddit.com/r/Bitcoin/comments/60ozkh/rogerver_lets_make_a_deal_1_for_1_trade_at_least/

bitcoin-cli signmessage 19Mz2o9RDABT74SA9njZqMtJXKEzj2qUoH '@RogerVer lets make a deal, 1 for 1 trade. At least 60k, possibly up to 130k, my BTU for your BTC.'
H9ed6z5RgdThRxXXqePmtJbaK1pGvoy6e+aiwUPD6pkrJ6d6TBchOu5OQLEbgq/15YRjcOUC+kMrGVfszUXV5Wc=