{'eventType': 'ECPPartialReturnEnricherMessage',
 'payload': [
     {'sessionId': 'someSessionId'},
     {'user'     : 'someUser'},
     {'tenant'   : 'someTenant'},
     {'action'   : 'partialreturn'},
     {'source' : [
        {'channelRef': 'someChannelRef'},
        {'date': '2015-11-25T10:08:21+00:00'},
        {'type': 'partial return'},
        {'body': [
            {'status': 'partial return'},
            {'date': '2015-11-25T10:08:21+00:00'},
            {'orderId': 'someOrderId'},
            {'lineItems': [
                [
                    {'ref': 'idOfProductBeingReturned'},
                    {'type': 'Product'},
                    {'pos': 1},
                    {'quantity': 3},
                    {'unit': 'e.g. kg'},
                    {'price_list': 'e.g. 10.0'},
                    {'price_effective': 'e.g. 8.5'},
                    {'status': 'returned'}
                ],
                [
                    {'ref': 'idOfProductBeingReturned_2'},
                    {'type': 'Product'},
                    {'pos': 2},
                    {'quantity': 1},
                    {'unit': 'e.g. kg'},
                    {'price_list': 'e.g. 15.0'},
                    {'price_effective': 'e.g. 12.5'},
                    {'status': 'returned'}
                ]
            ]}
        ]}
     ]}
]}