对不起，我发誓单数的textTab是需要在textTabs元素中使用，但看起来应该像这样被命名为 text 。这是一个有效的完整XML请求正文

Sorry, I could have sworn that the singular textTab was needed inside of the textTabs element, but it looks like this supposed to be named just text instead. Here is a full XML request body that works

<envelopeDefinition xmlns="http://www.docusign.com/restapi">
   <accountId>221765</accountId>
   <status>sent</status>
   <emailSubject>API Call for sending signature request from template</emailSubject>
   <emailBlurb>This comes from Java</emailBlurb>
   <templateId>DD92AF6F-3B87-435C-A652-A7451AFE758E</templateId>
   <templateRoles>
      <templateRole>
         <email>email@docusign.com</email>
         <name>John Doe</name>
         <roleName>Signer1</roleName>
         <tabs>
            <textTabs>
               <text>
                  <tabLabel>DataField1</tabLabel>
                  <value>Initial Data Goes Here</value>
               </text>
            </textTabs>
         </tabs>
      </templateRole>
   </templateRoles>
</envelopeDefinition>