curl --request POST \
  --url 'http://{{baseurl}}/api/v1/client/{environmentId}/displays' \
  --header 'Content-Type: application/json' \
  --data '
{
  "surveyId": "{{surveyId}}",
  "userId": "{{userId}} (optional)"
}
'

{
  "data": {
    "id": "clvc1z8200006494jgnds7ort"
  }
}