How to use /fscmService/ErpObjectDFFUpdateService?WSDL for Journal Voucher Header DFF Update

I have URI /fscmService/ErpObjectDFFUpdateService?WSDL. Need to use it to update Journal Vouchers' Header DFF.

In SOAP UI, when request created, the below request template is available

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:typ="http://xmlns.oracle.com/apps/financials/commonModules/shared/model/erpIntegrationService/types/" xmlns:erp="http://xmlns.oracle.com/apps/financials/commonModules/shared/model/erpIntegrationService/">
  <soapenv:Header/>
  <soapenv:Body>
     <typ:updateDffEntityDetails>
        <!--Optional:-->
        <typ:document>
           <erp:Content>cid:1620550137181</erp:Content>
           <erp:FileName>?</erp:FileName>
           <!--Optional:-->
           <erp:ContentType>?</erp:ContentType>
           <!--Optional:-->
           <erp:DocumentTitle>?</erp:DocumentTitle>
           <!--Optional:-->
           <erp:DocumentAuthor>?</erp:DocumentAuthor>