How do I pass a base 64 image to Roboflow's Infer API endpoint?

In the documentation for the API, it says to pass base64 images through the body of our POST request.

response = requests.post(roboflow_url, params=params, data=base64_image)

This is the request code and all it returns is error code 400. params is my API key. What do I do?

Documentation link : https://docs.roboflow.com/deploy/hosted-api/custom-models/object-detection