Event Sub Example Not Working

API
12 
            if (json_last_error() == JSON_ERROR_NONE) {
                mylog('Returning the challenge: ' . $data->challenge);
                echo rawurlencode($data->challenge);
                exit;
            }

Forgot that json_decode makes a object not an array by default

tested the script with TwitchCLI both to verify and recv a payload and it seems to be behaving as required now