Assign multiple trackers to the specified group.
required subuser rights: admin (available only to master users)
|id||group id, or 0 if trackers should be removed from any group||int|
|trackers||array of tracker ids||[int]|
- 201 (Not found in database) – if no group was found with the specified id (or group belongs to another user)
- 217 (List contains nonexistent entities) – if one or more of tracker ids belong to nonexistent tracker (or to a tracker belonging to different user)