You can only update 3 fields on a campaign once it's been created:

  1. UserGuid - A pass-through field that should tie to a unique user ID in your system
  2. ExpiresAt - The date we will stop recording data on a campaign, note this time is UTC and must be between 1970-01-01T00:00:01 and 2038-01-19T03:14:07.
  3. NeverExpires - If this is set to true, Litmus will never stop recording data and will ignore ExpiresAt.

The response is the campaign in json format with the updated values.

Click Try It! to start a request and see the response here!