One way would be to use CGI to get the values out for you. (assuming the response is in $response):

use CGI;

my $q = new CGI($response);

print 'My ID = ' . $q->param('id');
print 'My Results = ' . $q->param('results');
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This is probably safer than rolling your own method.

If you want to access them as a hash, you can call the Vars() method:

my %params = $q->Vars;

print "My ID = $params{'id'}";
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Note the difference in syntax to your example - you have to use double quotes to print variables, and hash elements are accessed with a $ sigil and curly brakets around the key name.