Invalid rule error on Create Rule Component using Launch API

I'm getting the below error while I use the API https://developer.adobelaunch.com/api/reference/1.0/rule_components/create/ even though I send the correct structure for the payload using python as mentioned in the link. 

"errors": [{
"code": "invalid-rule",
"title": "Invalid rule",
"detail": "can\'t be blank",
"source": {
"pointer": "/data/attributes/rule"}
Please note that the data/attributes/rule is not part of the attributes or the request response.

Can you help in this regard to eliminate this error?