InitializePaymentRequest

{
    "session_id": "string",
    "client_secret": "string",
    "object_type": "payment_link",
    "object_id": "string",
    "plan_id": "string",
    "payment_method": "wave",
    "amount": "string",
    "customer_id": "string",
    "customer_email": "user@example.com",
    "customer_phone": "string",
    "customer_name": "string",
    "customer_pin": "string",
    "custom_field_values": {},
    "metadata": {
        "property1": "string",
        "property2": "string"
    },
    "success_url": "http://example.com",
    "failure_url": "http://example.com",
    "idempotency_key": "string"
}