Thanks for your thread.
Now I can sign message, I will have a look to the encrypted messages!
Address: 1Ep4E4FqoqRqEfHG9MtZxvMkKyyEJqpfzR
Signature: IPWoXVjielX3kTu9ORO4MQaZjoONjf/kysevFpDDvgjqSOTH4R/slBuZ7yso/jfomRZfqmWMipsSlg2UFzcg5ns=