put https://api.projectmanager.com/api/data/tasks//fields/
Replaces the current value of a TaskFields for a specific Task within your Workspace.
A TaskField is a custom field defined within your Workspace for a specific Project. You can define TaskFields for any integration purpose that is important to your business. Each TaskField has a data type as well as options in how it is handled. TaskFields can be edited for each Task inside this Project.
Data Definition
See ChangeSetStatusDto for the complete data definition.