@type t() :: %Figler.Schema.PlaybackUpdate{
  is_top_level_frame_change: boolean() | nil,
  last_top_level_change: Figler.Schema.TopLevelPlaybackChange.t() | nil,
  last_top_level_change_status: Figler.Schema.PlaybackChangeKeyframe.t() | nil,
  pointer_location: Figler.Schema.Vector.t() | nil,
  scroll_mappings: [Figler.Schema.ScrollMapping.t()] | nil,
  state_mappings: [Figler.Schema.StateMapping.t()] | nil,
  timestamp: float() | nil
}