curl --request POST \
  --url https://api-message.nativehub.live/api/v1/dnc \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "phone": "+8801812345678",
  "reason": "User opt-out request"
}
'

{
  "id": "b4c5d6e7-f8a9-0123-bc45-678901234567",
  "tenant_id": "c3d4e5f6-a7b8-9012-cdef-123456789012",
  "phone_number": "+8801812345678",
  "reason": "User opt-out request",
  "created_at": "2026-02-10T11:20:00Z"
}