POST request returns body but no data

I am able to get my access token and use it to make a POST request but no matter what text I send the return is always: {"result":{"competencies_analysis":{}}}

I am currently using the exact code and address as the sample:

POST /v2/competencies/analyze/flatten

{'text':'Provide substance abuse education and counseling for at-risk individuals.','bias':0.4}

I have also tried other text inputs and the non-flattened analyze URL but I cannot seem to get any data returned.

Any Idea why this is happening?