curl --request POST \
  --url https://web-api.clerk.chat/public/campaigns \
  --header 'Content-Type: application/json' \
  --header 'apiKey: <api-key>' \
  --data '{
  "sender": "+1415456789",
  "provider": "whatsapp",
  "listName": "PremiumTierSubscribers",
  "mediaUrls": [
    "https://example.com/image.jpg"
  ],
  "body": "Hello, world!",
  "name": "Sale Reminder"
}'

{
  "data": {
    "id": 1,
    "body": "Hello, world!",
    "teamId": "1",
    "userId": "1",
    "name": "October Sale Reminder",
    "inboxId": "00000000-0000-0000-0000-000000000000",
    "status": "scheduled",
    "created": "2021-01-01T00:00:00.000Z",
    "updated": "2021-01-01T00:00:00.000Z",
    "error": "<string>"
  }
}