New Order

POST {{api_url}}/api/v3/order?symbol=BTCUSDT&side=BUY&type=LIMIT&quantity=0.0003&price=30000&timestamp={{timestamp}}&signature={{signature}}

Key	Datatype	Description
`symbol`	string	Symbol
`side`	string	ENUM：Order Side
`type`	string	ENUM：Order Type
`quantity`	string	Quantity
`quoteOrderQty`	number	Quote order quantity (For type: MARKET)
`price`	number	Price
`timestamp`	string
`signature`	string

Key	Datatype	Required	Description
`x-mexc-apikey`	string
`Content-Type`	string