2021-11-11 4:01:03[1636603263.5878] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 47.6838
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)

2021-11-11 6:01:03[1636610463.643] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 48.537
    [size] => -5
    [tif] => gtc
)
 Array
(
    [id] => 90943507687
    [contract] => DOT_USDT
    [mkfr] => 0
    [tkfr] => 0.0005
    [tif] => gtc
    [is_reduce_only] => 
    [create_time] => 1636610463.516
    [finish_time] => 1636610463.516
    [price] => 48.537
    [size] => -5
    [refr] => 0
    [left] => 0
    [text] => api
    [fill_price] => 48.5428
    [user] => 621225
    [finish_as] => filled
    [status] => finished
    [is_liq] => 
    [refu] => 0
    [is_close] => 
    [iceberg] => 0
)