# untested!
use Sort::Key;

my %key_type = (CollectionId => 'int',
                Framecount   => 'int',
                Status       => 'str',
                Missing      => 'int',
                Modified     => 'str');

my %order = (collection => [qw(-CollectionId -Modified)], # the minus
             framecount => [qw(-Framecount -Modified)],   # sign means
             status     => [qw(Status -Modified)],        # descending order
             missing    => [qw(-Missing -Modified)],
             modified   => [qw(-Modified)]);

my %sorter;
for my $order (keys %order) {
  my @types;
  my @keys;
  for (@{$order{$order}}) {
    /^(-?)(\w+)$/ or die;
    push @types, "$1$key_type{$2}";
    push @keys, $2;
  }
  $sorter{$order} = Sort::Key::multikeysorter { @{$_}{@keys} } @types;
}

sub printCollectionData {
  ...
  # Sort the collection according to orderBy param
  @sortedCollectionData = $sorter{$orderBy}->(@collectionData);
  ...
}