POST API

I'm struggling with a POST API between Bravo and Xano.

Currently I'm trying to set up the API in Xano, but I'm getting an 'Invalid timestamp format' error in the run and debug portion:

code:
ERROR_CODE_INPUT_ERROR,
message:
Invalid timestamp format.,
param:
created_at

Not sure what I may be doing wrong. Does anyone have any ideas? 🙂