Withdraws the transaction pair.
Transaction object - JSON object: Unsigned transaction, please refer to the Transaction chapter for the fields contained in it. Since the transaction type is
ExchangeWithdrawContract, the fields contained in
raw_data.contract.parameter.value in the transaction are as follows:
|token_id||string||The id of the token to be withdrawn|
|quant||int64||The amount of tokens to be withdrawn|