Timestamp value millisecond part automatic conversion

Hi,

I am trying to pass the timestamp value which is of type text in CDT from upstream through webapi. The milliseconds part is getting rounded off automatically

Value from Upstream: 2022-11-21T09:00:56.998992Z

Roundoff Value: 2022-11-21T09:00:57Z

Expected format : %Y-%m-%dT%H:%M:%S.%fZ"

But I need to send the same value from my upstream to my downstream system

Any solution for the above please?