{'eventType': 'ECPCompleteReturnServiceMessage',
 'payload': {
    'sessionId':'someSessionId',
    'user':'someUser',
    'tenant':'someTenant',
    'action':'return',
    'source':[
        {'channelRef':'someChannel'},
        {'date':'2015-11-25T10:08:21+00:00'},
        {'type':'return'},
        {'body':[
            'status':'complete return',
            'date':'2015-11-25T10:08:21+00:00',
            'orderId':'someOrderId']
        }
    ]
 }
}