How can I create Draft Orders with shipping line?

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New Member
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I use GraphiQL, api version: 2019-10. I have this: 

mutation draftOrderCreate($input: DraftOrderInput!) {
  draftOrderCreate(input: $input) {
    draftOrder {
      lineItems(first: 5) {
        edges {
          node {
            quantity
            variant {
              id
            }
          }
        }
      }
      shippingLine {
        shippingRateHandle
        title
      }
    }
    draftOrder {
      invoiceUrl
    }
    userErrors {
      field
      message
    }
  }
}

Query variables:

{
  "input": {
   "lineItems": {
      "quantity": 1,
      "variantId": "gid://shopify/ProductVariant/29037380108352"
    },
    "shippingLine": {
      "shippingRateHandle": "shopify-Standard%20Shipping-10.00",
       "title": "Standard Shipping"
    }
  }
}

 In my request i get :

...
"shippingLine": null,
...

why? Can you halp me? please )))