尽管DocuSign API存在于xml中，但它不会询问或设置dateSigned

Question

按照之前在StackOverflow（dateSignedTabs does not work）上找到的示例，我仍然无法获得签名日期。这是xml的片段。

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   <?xml version="1.0" encoding="UTF-8"?>
    <envelopeDefinition xmlns="http://www.docusign.com/restapi">
       <emailSubject>Boiler Contract -00006)</emailSubject>
       <status>sent</status>
       <documents>
          <document>
             <documentId>1</documentId>
             <name>VDBK SW6-CSIK-0001.pdf</name>
          </document>
       </documents>
       <recipients>
          <signers>
             <signer>
                <recipientId>1</recipientId>
                <routingOrder>1</routingOrder>
                <note>Team</note>
                <email>joebloggs@gmail.com</email>
                <name>Eric Test6-1</name>
                <tabs>
                   <signHereTabs>
                      <signHere>
                         <xPosition>58</xPosition>
                         <yPosition>617</yPosition>
                         <documentId>1</documentId>
                         <pageNumber>1</pageNumber>
                      </signHere>
                   </signHereTabs>
                   <dateSignedTabs>
                      <dateSigned>
                         <xPosition>58</xPosition>
                         <yPosition>440</yPosition>
                         <tabLabel>Date Signed</tabLabel>
                         <name>Date Signed</name>
                         <documentId>1</documentId>
                         <pageNumber>1</pageNumber>
                         <recipientId>1</recipientId>
                      </dateSigned>
                   </dateSignedTabs>
                </tabs>
             </signer>
          </signers>
       </recipients>
    </envelopeDefinition>

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有人能说出这是关闭的原因吗？