{
  "event": "send_onboarding_email",
  "to_email": "user@example.com",
  "to_name": "Анна",
  "template_id": "d-1234567890abcdef1234567890abcdef",
  "category": "onboarding",
  "customer_id": "cust-1042",
  "dynamic_template_data": {
    "first_name": "Анна",
    "activation_url": "https://example.ru/activate",
    "plan": "Pro"
  },
  "consent": "transactional"
}