'Initialize the NotificationInstance
:returns: twilio.rest.notify.v1.service.notification.NotificationInstance
:rtype: twilio.rest.notify.v1.service.notification.NotificationInstance'

def __init__(self, version, payload, service_sid):

    super(NotificationInstance, self).__init__(version)
    self._properties = {'sid': payload['sid'], 'account_sid': payload['account_sid'], 'service_sid': payload['service_sid'], 'date_created': deserialize.iso8601_datetime(payload['date_created']), 'identities': payload['identities'], 'tags': payload['tags'], 'segments': payload['segments'], 'priority': payload['priority'], 'ttl': deserialize.integer(payload['ttl']), 'title': payload['title'], 'body': payload['body'], 'sound': payload['sound'], 'action': payload['action'], 'data': payload['data'], 'apn': payload['apn'], 'gcm': payload['gcm'], 'fcm': payload['fcm'], 'sms': payload['sms'], 'facebook_messenger': payload['facebook_messenger'], 'alexa': payload['alexa']}
    self._context = None
    self._solution = {'service_sid': service_sid}
