{ "title": "Your order has shipped!", "content": "Your order #ORD-98765 has been shipped and will arrive by Friday.", "action_url": "https://app.example.com/orders/ORD-98765", "category": "order-updates", "recipients": { "matches": "email:customer@example.com" }, "overrides": { "channels": { "email": { "subject": "Order #ORD-98765 Shipped" }, "mobile_push": { "title": "Your order shipped!" } } } }