SOAP API addDocuments request and response

Request:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:com="http://common.services.adyen.com" xmlns:ext="http://external.accountcreation.mam.services.adyen.com" xmlns:ext1="http://external.merchant.mam.services.adyen.com">   <soapenv:Header />
   <soapenv:Body>
      <ext:addDocuments>
         <ext:accountCreationRequest>
            <ext:documentData>
               <ext:documents>
                  <!--Zero or more repetitions:-->
                  <ext1:Document>
                     <ext1:description>Passports of all shareholders</ext1:description>
                     <ext1:documentBytes>cid:1052133800464</ext1:documentBytes>
                     <ext1:documentType>PASSPORT</ext1:documentType>
                     <ext1:filename>scanned_passports.pdf</ext1:filename>
                  </ext1:Document>
               </ext:documents>
               <ext:merchantCode>TestMerchant</ext:merchantCode>
            </ext:documentData>
         </ext:accountCreationRequest>
      </ext:addDocuments>
   </soapenv:Body>
</soapenv:Envelope>

Response: 

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns0="http://external.accountcreation.mam.services.adyen.com" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">   
<soap:Body>
      <ns0:addDocumentsResponse>
         <ns0:response>
            <ns0:merchantCode>TestMerchant</ns0:merchantCode>
            <ns0:pspReference>9914024071740010</ns0:pspReference>
         </ns0:response>
      </ns0:addDocumentsResponse>
   </soap:Body>
</soap:Envelope>