The link identifier is used implicitly in subsequent operations based on request headers provided during authentication. Such as when creating a new Device, this information is implicitly used.
If this link is not defined, the creation of a new device will result in an Entity Not Found error, even if all of the request payload parameters are correctly set.
If the timestamp field in the payload is not provided, the system will default to using the time the payload was received as the position's timestamp.
The timestamp can be in any timezone, and the Tracker HUB will always store and return the timestamp in UTC.
The same goes for querying time intervals, the start and end dates can be in any timezone, and the interval will always compare them in UTC
Timestamp values for both payloads and filter parameters follow the RFC 3339 standard, which is a stricter subset of the ISO 8601 standard.