The payload used in the request to create a new review via the WaniKani API.
https://docs.api.wanikani.com/20170710/#create-a-review
A review object with either the assignment_id or subject_id specified.
assignment_id
subject_id
The payload used in the request to create a new review via the WaniKani API.
See
https://docs.api.wanikani.com/20170710/#create-a-review