Modify how user segments are considered by Kevel Forecast by associating a forecast type.
Currently, the only type of user segments that can be defined is "static".

Typically, Kevel Forecast considers the user's segment membership as it existed at the time of the historical Ad Request.
Setting a user segment as static will cause Kevel Forecast to consider its membership as the result of the ingested files.
These segments can be targeted by user segment targeting rules.

The keys of the JSON object must be the numeric segment IDs (as strings). Entries with non-numeric keys are rejected.

Note that this endpoint fully replaces the existing set, so to remove all types association send an empty JSON object.
See Static Audiences for more details on this feature.