curl --request POST \
  --url https://www.referralloop.dev/api/v1/waitlists/{waitlistId}/signups \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "user@example.com",
  "name": "John Doe"
}
'

{
  "signup": {
    "id": "789e0123-e89b-12d3-a456-426614174000",
    "email": "user@example.com",
    "name": "John Doe",
    "position": 151,
    "referral_code": "XYZ789",
    "referral_url": "https://www.referralloop.dev/w/product-launch?ref=XYZ789",
    "created_at": "2024-01-15T10:00:00Z"
  }
}