Javascript object:

{
emailAddressTypeItems:
   [ { emailAddressType: [Object] },
     { emailAddressType: [Object] } ]
}

SOAP request XML:

<emailAddressTypeItems>
  <emailAddressTypeItems>
   <emailAddressType><referenceId>...</referenceId></emailAddressType>
  </emailAddressTypeItems>

  <emailAddressTypeItems>
   <emailAddressType><referenceId>...</referenceId></emailAddressType>
  </emailAddressTypeItems>
</emailAddressTypeItems>