curl --request GET \
  --url https://api.virtuoussoftware.com/api/Event/{eventId}/Contacts \
  --header 'Authorization: Bearer <token>'

{
  "list": [
    {
      "id": "<integer>",
      "eventContactUrl": "<string>",
      "createDateTimeUtc": "<dateTime>",
      "createdByUser": "<string>",
      "modifiedDateTimeUtc": "<dateTime>",
      "modifiedByUser": "<string>",
      "contactId": "<integer>",
      "contactUrl": "<string>",
      "displayName": "<string>",
      "firstName": "<string>",
      "avatarUrl": "<string>",
      "primaryPhone": "<string>",
      "primaryEmail": "<string>"
    },
    {
      "id": "<integer>",
      "eventContactUrl": "<string>",
      "createDateTimeUtc": "<dateTime>",
      "createdByUser": "<string>",
      "modifiedDateTimeUtc": "<dateTime>",
      "modifiedByUser": "<string>",
      "contactId": "<integer>",
      "contactUrl": "<string>",
      "displayName": "<string>",
      "firstName": "<string>",
      "avatarUrl": "<string>",
      "primaryPhone": "<string>",
      "primaryEmail": "<string>"
    }
  ],
  "total": "<integer>"
}