Array
(
    [title] => Array
        (
            [0] => The masterpiece
        )

    [artist] => Array
        (
            [0] => David S
        )

    [recording_time] => Array
        (
            [0] => 2006
        )

    [comments] => Array
        (
            [0] => My first song
        )

    [content_type] => Array
        (
            [0] => Classic Rock
        )

    [year] => Array
        (
            [0] => 2006
        )

)