Create activities for an user with Stream-Framework

I'm trying to setup stream-framework the one here not the newer getstream. I've setup the Redis server and the environment properly, the issue I'm facing is in creating the activities for a user.

I've been trying to create activities, following the documentation to add an activity but it gives me an error message as follows:

...
  File "/Users/.../stream_framework/activity.py", line 110, in serialization_id
    if self.object_id >= 10 ** 10 or self.verb.id >= 10 ** 3:
AttributeError: 'int' object has no attribute 'id'

Here is the code

from stream_framework.activity import Activity
from stream_framework.feeds.redis import RedisFeed


class PinFeed(RedisFeed):
    key_format = 'feed:normal:%(user_id)s'

class UserPinFeed(PinFeed):
    key_format = 'feed:user:%(user_id)s'

feed = UserPinFeed(13)
print(feed)

activity = Activity(
    actor=13, # Thierry's user id
    verb=1, # The id associated with the Pin verb
    object=1, # The id of the newly created Pin object
)

feed.add(activity) # Error at this line

I think there is something missing in the documentation or maybe I'm doing something wrong. I'll be very grateful if anyone helps me get the stream framework working properly.

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