Step 2 is rather boring. No response body will come back, look for an HTTP 204 response. Once you have that move on to Step 3. That is where you will get back your image ID that can be used in subsequent calls into the EB API.
>>> EventBrite API should provide **syntax agnostic examples** of how to use their API such as cURL, PostMan, etc. <<<
Thanks, Whitney, for your example.
~krigi