This is a PGP signed proof of address ownership, signed by the Alphabay server's PGP public key.
The address 19LrL7TWCQZFfiWEeNagiTxh4vN3LUdZxB belongs to the marketplace user kaithach.
The address is valid as of October 10, 2016 at 07:16 Moscow time.
It received no funds and is guaranteed to be valid until October 15, 2016 at 07:16 Moscow time.