curl --request POST \
  --url https://{notifuseDomain}/api/transactional.send \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "workspace_id": "ws_1234567890",
  "notification": {
    "id": "welcome_email",
    "contact": {
      "email": "user@example.com",
      "external_id": "user_12345",
      "timezone": "America/New_York",
      "language": "en-US",
      "first_name": "John",
      "last_name": "Doe",
      "phone": "+15551234567",
      "address_line_1": "123 Main St",
      "address_line_2": "Apt 4B",
      "country": "US",
      "postcode": "10001",
      "state": "NY",
      "job_title": "Software Engineer",
      "lifetime_value": 1250.5,
      "orders_count": 5,
      "last_order_at": "2023-05-15T14:30:00Z",
      "custom_string_1": "Premium tier",
      "custom_string_2": "<string>",
      "custom_string_3": "<string>",
      "custom_string_4": "<string>",
      "custom_string_5": "<string>",
      "custom_number_1": 42,
      "custom_number_2": 123,
      "custom_number_3": 123,
      "custom_number_4": 123,
      "custom_number_5": 123,
      "custom_datetime_1": "2023-06-01T09:00:00Z",
      "custom_datetime_2": "2023-11-07T05:31:56Z",
      "custom_datetime_3": "2023-11-07T05:31:56Z",
      "custom_datetime_4": "2023-11-07T05:31:56Z",
      "custom_datetime_5": "2023-11-07T05:31:56Z",
      "custom_json_1": {
        "preferences": {
          "theme": "dark",
          "notifications": true
        }
      },
      "custom_json_2": {},
      "custom_json_3": {},
      "custom_json_4": {},
      "custom_json_5": {},
      "created_at": "2023-01-15T10:30:00Z",
      "updated_at": "2023-04-22T15:45:00Z"
    },
    "channels": [
      "email"
    ],
    "data": {
      "user_name": "John Doe",
      "activation_link": "https://example.com/activate/abc123"
    },
    "metadata": {
      "campaign_id": "spring_promo_2023",
      "source": "user_signup"
    },
    "email_options": {
      "cc": [
        "manager@example.com"
      ],
      "bcc": [
        "archive@example.com"
      ],
      "reply_to": "support@example.com"
    }
  }
}'