I'm trying to insert a new sale order with some lines using REST JSON 2 API, but I can only find examples about XMLRPC or JSONRPC.

I could insert empty sale order, the point is how to add lines in unique request.

I tried:

POST http://localhost:8069/json/2/sale.order/create

{
    "vals_list":{
        "partner_id": 6,
        "order_line": [
            {
                "product_id": 1,
                "product_uom_qty": 1
            }
        ]
    }
}

But it fails with unhashable type: 'dict' error