如何在vue.js?的模板部分顯示字符串值

我開發了一個頁面，負責顯示訂單成功消息，我從包含orderId的后端得到響應，我得到了響應，我可以在前端綁定，但我在UI頁面中得到json格式的輸出，但我需要的是只顯示orderId值（如string).please幫助我解決這個問題。。。

我只想顯示orderID值

OrderPlace.vue

<template>
<div class="order-place">
    <div class="image-container">
        <img src="../assets/success.png" alt="not found" />

    </div>
    <div class="title-container">
        <p>Order placed Successfully</p>
    </div>
    <div class="message-section">
        <p>Hurray!!!your order is confirmed and placed successfully contact us in below details
            for further communication..</p>
    </div>
    <div class="order-id">
          
            {{orderNumber}}
           
            
        </div>
    <div class="title-section">
        <div class="email-us">
            <p>Email-us</p>
        </div>
        <div class="contact-us">
            <p>Contact-us</p>
        </div>
        <div class="address">
            <p>Address</p>
        </div>
    </div>
    <div class="email-sec">
        <p>admin@bookstore.com</p>
    </div>
    <div class="contact-sec">
        <p>+918163475881</p>
    </div>
    <div class="address-sec">
        42, 14th Main, 15th Cross, Sector 4 ,opp to BDA complex, near Kumarakom restaurant, HSR Layout, Bangalore 560034
    </div>
    <div class="button">
        <router-link to="/dashboard" class="btn">Continue Shopping</router-link>
    </div>
</div>
</template>

<script>
import service from '../service/User';
// import { EventBus } from "./event-bus.js"; 
export default {
    name: 'OrderPlace',
    
    data(){
        return{
            successTitle:'Order placed Successfully',
            adminEmailSection:'Email-us',
            adminContactSection:'Contact-us',
            adminAddressSection:'Address',
            adminEmail:'admin@bookstore.com',
            adminMobNum:'+918163475881',
            orderNumber: ''
        }        
    },
   created() {
        service.confirmMail().then(response =>            
            (this.orderNumber=JSON.stringify(response.data))
        )
    } 
}
</script>