product.json

{
  "product": {
    "grid_size_name": "P-M-G",
    "batch_products": {
      "batch_name": "PRODUÇÃO",
      "variants": [
        {
          "sku": "002",
          "sizes": [
            {
              "size": "P",
              "amount": 2
            },
            {
              "size": "M",
              "amount": 4
            },
            {
              "size": "G",
              "amount": 3
            }
          ]
        }
      ]
    }
  }
}