CartInput

input CartInput {
  lines: [CartLineInput]
  buyerIdentity: BuyerIdentityInput
}

mutation CreateCart($input: CartInput!) {
  createCart(input: $input) {
    cart {
      id
      lines {
        id
        quantity
      }
    }
  }
}
 
# Variables
{
  "input": {
    "lines": [
      {
        "productId": 12345,
        "quantity": 2
      }
    ],
    "buyerIdentity": {
      "email": "customer@example.com",
      "countryCode": "US"
    }
  }
}