Evaluate an activity

Input data for activity evaluation. A session token is an identifier that will link together activities done in the same end user session to identify the grouping of activities that belong together. It is represented in FrankieOne as a ULID but can differ if not FrankieOne generated. The session token may be provided to tie in the activity to a longer running overall session. There are a few options for session tokens: * A session token may not be provided. It is optional to provide but there must be configuration in your account to allow this - FrankieOne will generate a session token on your behalf to identify the overarching session, you may then use this for further calls for the extent of the service. This is not recommended when device signals are important to your use case. * A session token generated on the client side and not registered with FrankieOne. The client can generate some sort of unique ID to identify the session and provide that at the time of call and manage the session token for the duration of the session. This can be used when device signals are required. * A session token can be generated in a seperate API within FrankieOne - Refer to the `Create Individual Session` API. This will register the session in FrankieOne and tie it to the individual of interest. There is configuration in your account which can enforce session ownership to avoid clients modifying the session token, adding another layer of security. This can be used when device signals are required.