Adds and removes labels from multiple contacts.
Labels are added to and removed from all contacts that meet the specified
filter and search criteria.
The request should contain a filter value or a search value, or both. To perform a dry run, use the intended filter options with
Query Contacts.
When this endpoint is used, a bulk job is started and the job ID is returned. The job might not not complete right away, depending on its size. The job's status can be retrieved with Get Bulk Job or List Bulk Jobs.