Pass in the required arguments for a payload, the enc type and the cmd,
    then a list of keyword args to generate the body of the load dict.

def format_payload(enc, **kwargs):
    '''
    Pass in the required arguments for a payload, the enc type and the cmd,
    then a list of keyword args to generate the body of the load dict.
    '''
    payload = {'enc': enc}
    load = {}
    for key in kwargs:
        load[key] = kwargs[key]
    payload['load'] = load
    return package(payload)