put
https://stage-expense.findity.com/api/admin/organizations/externalid//customdimensions//list/approvers/
Updates only the approver assignments on existing values of a custom dimension's list — leaves the values themselves untouched. Send the desired approver set per value in the body; pass clearApproversNotInInput=true to also strip approvers from values not mentioned. Use this to sync approver mappings from an HR or identity-management system without affecting the value catalogue.