Detect the recently uploaded files per package

Hello,

We need to detect the upload date per file for our “Recent File Uploads” feature for every package.. We noticed that the plugin saves the attributes per file in the postmeta field labeled as__wpdm_fileinfo, it saves the attributes like this:

Array
(
    [1484908445087] ► Array
        (
            [title] ► BULL-epi0101-0220bi.jpg
            [password] ► 
        )

    [1484730826923] ► Array
        (
            [title] ► before import.png
            [password] ► 
        )
....

Is it possible if we add a new field here for the upload date so it will become

Array
(
    [1484908445087] ► Array
        (
            [title] ► BULL-epi0101-0220bi.jpg
            [password] ► 
            [upload_date] ► <em>upload_date_here</em>
        )
....

?

If this is possible, where could we safely customize this part of code? Or is there any better way to achieve this? Thanks!