post https://a.klaviyo.com/api/campaign-recipient-estimation-jobs/
Trigger an asynchronous job to update the estimated number of recipients for the given campaign ID. Use the Get Campaign Recipient Estimation Job endpoint to retrieve the status of this estimation job. Use the Get Campaign Recipient Estimation endpoint to retrieve the estimated recipient count for a given campaign.
Rate limits:
Burst: 10/s
Steady: 150/m
Scopes:
campaigns:write