使用SoapClient发送关联的对象（PHP）

I want to send an object trough the SoapClient in PHP. How would I handle associations correctly? I don't know if this is the right format. On the WCF Side, I just get a null Person.

Lets say I want to send a Person with following Structure (Capitalized are the complex data types):

PERSON
--> PersonId
--> Name
--> Age
--> Gender
--> ADDRESS
   --> AddressId
   --> Street
   --> City
   --> Country

This is how I have tried so far...

$soapclient = GetSoapClient();

$person = array(
   'PersonId' => 123,
   'Name' => 'Tom'
   'Age' => 45
   'Gender' => 'Male',
   'Address' => array(
      'AddressId' => 424
      'Street' => 'Washington Street 2'
      'City' => 'Washington'
      'Country' => 'US'
   )
);

$soapClient->UpdatePerson($person);