||Receives members relating to a Watchlist.||
|ID||The unique identifier of the Watchlist to receive members for|
An ordered array of zero or more Watchlist Member Change objects, to be applied in sequence.
|O||String||Always||The operation being performed. One of:
A: Adding a new Watchlist Member.
U: Updating an existing Watchlist Member.
R: Removing a Watchlist Member.
C: Clearing all Watchlists
|Watchlist||Object||Optional||A Watchlist object. Will be omitted when clearing. Will always be provided in all other situations.|
|Market||String||Always||The Market the member Symbol is listed on|
|Code||String||Always||The Symbol that is a member of the Watchlist|