$VAR1 = { 
	'activityContacts' => [ 
		{ 'foo' => 'bar', 'baz' => 'foo', ... }, 
		{ 'foo' => 'bar', 'baz' => 'foo', ... }
	],
	'currentAgent' => { 
		'foo' => 'bar', 
		'baz' => 'foo', 
		...
	}, 
	'activityData' => [
		{ 'textfeldMini' => ' ', 'fragebogen_id' => '4388', 'aktivitaet_data_id' => '48541093', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'fragebogen_id' => '4389', 'aktivitaet_data_id' => '48541094', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'fragebogen_id' => '4390', 'aktivitaet_data_id' => '48541095', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'fragebogen_id' => '4391', 'textfeldStandard' => ' ', 'aktivitaet_data_id' => '48541096', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'fragebogen_id' => '4392', 'textfeldStandard' => ' ', 'aktivitaet_data_id' => '48541097', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'textfeldMini' => ' ', 'fragebogen_id' => '4393', 'aktivitaet_data_id' => '48541098', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'textfeldMini' => 'k.A.', 'fragebogen_id' => '4394', 'aktivitaet_data_id' => '48541099', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'fragebogen_id' => '4395', 'textfeldStandard' => ' ', 'aktivitaet_data_id' => '48541100', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'fragebogen_id' => '4396', 'textfeldStandard' => ' ', 'aktivitaet_data_id' => '48541101', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'fragebogen_id' => '4397', 'textfeldStandard' => ' ', 'aktivitaet_data_id' => '48541102', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'textfeldMini' => 'k.A.', 'fragebogen_id' => '4398', 'aktivitaet_data_id' => '48541103', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'fragebogen_id' => '4399', 'textfeldStandard' => ' ', 'aktivitaet_data_id' => '48541104', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'datumfeld' => '2000-01-01T00:00:00+01:00', 'fragebogen_id' => '4400', 'aktivitaet_data_id' => '48541105', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'datumfeld' => '2000-01-01T01:00:00+01:00', 'fragebogen_id' => '4401', 'aktivitaet_data_id' => '48541106', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'textfeldClob' => ' ', 'fragebogen_id' => '4402', 'aktivitaet_data_id' => '48541107', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }, 
		{ 'textfeldClob' => ' ', 'fragebogen_id' => '4403', 'aktivitaet_data_id' => '48541108', 'zahlfeld' => '0.0', 'aktivitaetId' => '48541091' }
	], 
	'activity' => { 
		'foo' => 'bar', 
		'baz' => 'foo', 
		...
	}
};

##</code><code>##

my $aktAkt = $aktivitaet->{'activity'};
my @aktData = $aktivitaet->{'activityData'};
my $aktAgent = $aktivitaet->{'currentAgent'};

##</code><code>##

my $aktData = $aktivitaet->{'activityData'}; #Note the scalar variable
...
foreach my $data (@$aktData) 
{
	if ($data->{'fragebogen_id'} == $feedbackId)
	{
		#doStuff
	}
}