cURL PUT on a Child Project Area

I am trying to update state in Child Project Area using cURL PUT. Child Project area inherits Process Configuration from Parent PA. While submitting a cURL PUT, it completed without errors but at the same time did not update the State of the Build WI. Tried the same thing on Parent PA and it worked smoothly. I presume since the action is not actually present in Child PA, cURL PUT is unable to detect what needs to be done and hence didnt update the state of Build WI in Child PA. Insights?

Thanks