{
  "Username": "helpdesk@smartyoung.com",
  "Password": "34B0usEWR!",
  "Action": "addEvent",
  "Data": {
    "Title": "Norw",
    "Description": "Norw",
    "Admission": "3",
    "ExternalEventID": "678",
    "Location": "1",
    "HostName": "2",
    "CatIDs": [
      31,
      3,
      1
    ],
    "RelatedExternalEventIDs": [
      "678"
    ],
    "StartDate": "2018-01-17",
    "StartTime": "12:00",
    "EndTime": "15:00",
    "EventDates": [
      {
        "EventDate": "2018-01-17",
        "StartTime": "12:00",
        "EndTime": "15:00"
      }
    ],
    "AcctId": "37372",
    "Email": "test@test.test",
    "Phone": "5555555555555",
    "Addr1": "TestAddress",
    "City": "TRONDHEIM",
    "Zip": "7012",
    "udf_Introduction": "Norw",
    "Locale": "no",
    "Longitude": 9.634838,
    "Latitude": 62.567193,
    "udf_importLanguage": "2"
  }
}

{"Success":0,"ErrorID":5820635,"Error":"Duplicate ExternalEventID"}