curl --request PUT \
  --url https://nudgen.net/api/v1/campaigns/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "goal": "<string>",
  "subject": "<string>",
  "html": "<string>",
  "link": "<string>",
  "audienceTags": [
    "<string>"
  ],
  "audienceContactIds": [
    "<string>"
  ],
  "sendNow": true,
  "scheduledAt": "2023-11-07T05:31:56Z"
}
'

{
  "error": "<string>"
}