curl --request POST \
  --url https://api.embedreach.com/api/communication-groups/{id}/test \
  --header 'Content-Type: application/json' \
  --data '{
  "emailAddress": "<string>",
  "phoneNumber": "<string>",
  "previewAsRecipientId": "<string>"
}'

{
  "success": true,
  "message": "<string>",
  "data": {
    "id": "<string>"
  }
}