Well, if you just need the line before \nAction, you could try something like:

my @deviceNames = do {
  open (my $FH, "<", $file)
    or die "Error: couldn't read '$file': $!\n";

   # split up lines by \nAction: within the do-block
  local $/ = "\nAction:";

  my @deviceNames = ();
  while (my $block = <$FH>) {
    # extract the last line
    my $deviceName = ( split(/\n/, $block) )[-1];

    push (@deviceNames, $deviceName) if $deviceName;
  } # while

  # well, the following line is not really needed, because
  # $FH is automatically closed at the end of the do-block
  close ($FH);
  @deviceNames;
} ; # do
[download]

or the like (not tested)

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