2021-11-09 15:01:02[1636470062.9687] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 51.3055
    [size] => -8
    [tif] => gtc
)
 Array
(
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    [is_reduce_only] => 
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    [finish_time] => 1636470062.821
    [price] => 51.3055
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)

2021-11-09 17:01:03[1636477263.3673] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 51.3371
    [size] => 1
    [tif] => gtc
)
 Array
(
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)