如何以ManyToOne关系向api-platform发送子数据数组？

// src/Entity/Customer.php
namespace App\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use ApiPlatform\Core\Annotation\ApiResource;
use Symfony\Component\Serializer\Annotation\Groups;

/**
 * @ApiResource(normalizationContext={"groups"={"read"}})
 */
class Customer
{
    // ...

    /**
     * @var Collection|Order[]
     *
     * @Groups({"read"})
     */
    private $orders;

    public function __construct()
    {
        $this->orders = new ArrayCollection();
    }

    // ...
}

// src/Entity/Order.php
namespace App\Entity;

use ApiPlatform\Core\Annotation\ApiResource;
use Symfony\Component\Serializer\Annotation\Groups;

/**
 * @ApiResource(normalizationContext={"groups"={"read"}})
 */
class Order
{
    // ...

    /**
     * @var Customer
     *
     * @Groups({"read"})
     */
    private $customer;

    // ...
}

resources:
    App\Entity\Customer:
        normalization_context:
            groups: ['read']
        attributes:
            order:
                - 'id'
                - 'customer' # 双向关系时需要

    App\Entity\Order:
        normalization_context:
            groups: ['read']

{
  "name": "John Doe",
  "orders": [
    {
      "product": "Product A",
      "quantity": 2
    },
    {
      "product": "Product B",
      "quantity": 1
    }
  ]
}