<?xml version="1.0" encoding="utf-8"?>
<AddToWatchListRequest xmlns="urn:ebay:apis:eBLBaseComponents">
  <RequesterCredentials>
    <eBayAuthToken>A*******3</eBayAuthToken>
  </RequesterCredentials>
  <WarningLevel>High</WarningLevel>
  <!-- Must be the Item ID of an active listing -->
  <ItemID>1**********7</ItemID>
</AddToWatchListRequest>