Claims a task for a specific user.
Note: The difference with the Set Assignee method is that here a check is performed to see if the task already has a user assigned to it.
Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.
The id of the task to claim.
Provide the id of the user that claims the task.
The id of the user that the current action refers to.
Request successful.