HistoryEntry

One record the station actually played

Attributes (8)

Attribute	Type	Required	Description
id	string	Yes	Unique across the history, and half of the cursor below
airedAt	string	Yes	When it started, written when it began rather than when it was handed to the player
title	string	Yes
artists	string	Yes	The credit as written, whole: one line rather than a list, because that is the shape a release credits itself in and splitting it renames acts with a comma in their name
album	string	No	Absent for anything aired straight from a provider, which the catalog holds no record for
artworkUrl	string	No	The station's own copy where it has one, as a path under the API root, and the upstream URL until then. Resolve it against the base the station is reached at
durationMs	number	No	How long the recording runs, from the catalog rather than from the copy that played
trackId	string	No	The catalog track this was, for a client that wants to ask more about it. Absent for a record the catalog does not hold, and for one it has since forgotten