GET api/2.0/settings/security/administrator/{productid}

Функция требует авторизации

application/json

{
  "status": 0,
  "response": [
    {
      "id": "00000000-0000-0000-0000-000000000000",
      "displayName": "Mike Zanyatski",
      "title": "Manager",
      "avatarSmall": "url to small avatar",
      "profileUrl": ""
    }
  ]
}

text/xml

<result>
  <status>0</status>
  <response>
    <id>00000000-0000-0000-0000-000000000000</id>
    <displayName>Mike Zanyatski</displayName>
    <title>Manager</title>
    <avatarSmall>url to small avatar</avatarSmall>
    <profileUrl></profileUrl>
  </response>
</result>