For the commercial endpoint, it says:
The length of the commercial (in seconds) is specified in the request body, with a required length parameter. Valid values are 30, 60, 90, 120, 150, and 180.
How would I go about running a 300 second (5 minute) advert? This is possible via the dashboard but it appears if I send a request to this endpoint with {"length":300}
it will return a 422.