How to set the shipping charge amount value when I create an order using restful api

Hi,

When I create an order, set the shipping amount value not work.

Body is below:

{
“order”: {
“line_items”: [{
“variant_id”: 44742993740007,
“price”: 1009.2,
“quantity”: 2
}],
“[email removed]
“discount_codes”: [{“code”:“test”,“amount”:“18.4”,“type”:“fixed_amount”}],
“total_shipping_price_set”: {
“shop_money”: {
“amount”: “5.50”,
“currency_code”: “HKD”
}
}

}
}