Within perl you can do the following to find an element in an array:
if (grep {$_ eq $element} @TheArray) { print "Element '$element' found!\n" ; }
(Original article here How to find out if X is an element in an array? )
You can adapt this to your scenario by doing:
print $_->value if (grep {$_->key =~ /cloud.uuid/} @$extra);
