Hi Valarmathi,
Thank you for reaching out. Yes, this is possible however there are unfortunately no examples available. I would recommend following the instructions
here starting at step 3. In order to create the XML, you can follow the WSDL structure of the AdwordsUserListService
here. You need to use the
MutateMembersOperand to set the ID of the user list and also to specify the members you're going to upload. You should also make sure to set the
MutateMembersOperation to ADD.
The XML body should look similar to the following:
<soapenv:Body>
<mutateMembers xmlns="
https://adwords.google.com/api/adwords/rm/v201809">
<operations>
<ns7:operator xmlns:ns7="
https://adwords.google.com/api/adwords/cm/v201809">ADD</ns7:operator>
<operand>
<userListId>xxxxxxxxxx</userListId>
<membersList>
<hashedEmail>123abc</hashedEmail>
</membersList>
</operand>
</operations>
</mutateMembers>
</soapenv:Body>
Regards,
Mitchell
Google Ads API Team

ref:_00D1U1174p._5004Q218KIj:ref