diff --git a/models/cumulative.ts b/models/cumulative.ts
new file mode 100644
index 0000000..9c2f97d
--- /dev/null
+++ b/models/cumulative.ts
@@ -0,0 +1,10 @@
+import { Track } from './track';
+
+export interface Cumulative {
+  date_first_scraped: string;
+  description: string;
+  name: string;
+  published_playlist_ids: string[];
+  tracks: Track[];
+  url: string;
+}
diff --git a/models/calendar-entry.ts b/models/snapshot.ts
similarity index 57%
rename from models/calendar-entry.ts
rename to models/snapshot.ts
index f8cca15..35f6329 100644
--- a/models/calendar-entry.ts
+++ b/models/snapshot.ts
@@ -1,5 +1,6 @@
-export interface CalendarEntry {
+export interface Snapshot {
   snapshotId: string;
   commitSha: string;
   dateCaptured: string;
+  numFollowers: number;
 }
diff --git a/models/track.ts b/models/track.ts
index b0e33b5..3cd3ec9 100644
--- a/models/track.ts
+++ b/models/track.ts
@@ -10,4 +10,9 @@ export interface Track {
   duration_ms: number;
   name: string;
   url: string;
+  date_added: string;
+  date_added_asterisk: boolean;
+  date_removed: string | null;
+  position?: string;
+  retention?: number;
 }