You can vary what you look for, based on what you know about the data. If newline followed by an open-square-bracket is reliable enough, you can do 
my $whatIwant = substr($wholefield, rindex($wholefield, "\n[")+1);

[download]
If you need to match the timestamp format to reliably know that you've found a comment boundary, you'll need to use a regex, as frodo72 illustrated in his example 3. Spell out as much as you need to to get a reliable boundary.

No matter what you choose, it will be possible that one of the comments includes the pattern you look for. That's only a problem if it happens to be the last comment, in which case you'll end up with just the last portion of that comment instead of the whole thing.

Caution: Contents may have been coded under pressure.

In reply to Re^3: Parsing a data field that is seperated by data/time entries by Roy Johnson
in thread Parsing a data field that is seperated by data/time entries by TASdvlper

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.