Array
(
    [ln_first_name] => Closure Object
        (
            [parameter] => Array
                (
                    [$option] => <required>
                    [$fallback] => <required>
                    [$campaignID] => <optional>
                    [$subscriberID] => <optional>
                )

        )

    [ln_last_name] => Closure Object
        (
            [parameter] => Array
                (
                    [$option] => <required>
                    [$fallback] => <required>
                    [$campaignID] => <optional>
                    [$subscriberID] => <optional>
                )

        )

)
Array
(
    [0] => Array
        (
            [ID] => 1
            [hash] => b1b8dbc0e46580132db641c2f587ece8
            [email] => epsil_on@mail.ru
            [wp_id] => 2
            [status] => 1
            [added] => 1559862428
            [updated] => 1559862428
            [signup] => 1224548038
            [confirm] => 0
            [ip_signup] => 136.169.209.42
            [ip_confirm] => 136.169.209.42
            [rating] => 0.50
        )

)
Subscriber ID=1
Done.