diff --git a/lib/actions/synced-metadata-actions.js b/lib/actions/synced-metadata-actions.js
new file mode 100644
--- /dev/null
+++ b/lib/actions/synced-metadata-actions.js
@@ -0,0 +1,10 @@
+// @flow
+
+const addSyncedMetadataEntryActionType = 'ADD_SYNCED_METADATA_ENTRY';
+
+const removeSyncedMetadataEntryActionType = 'REMOVE_SYNCED_METADATA_ENTRY';
+
+export {
+  addSyncedMetadataEntryActionType,
+  removeSyncedMetadataEntryActionType,
+};
diff --git a/lib/types/redux-types.js b/lib/types/redux-types.js
--- a/lib/types/redux-types.js
+++ b/lib/types/redux-types.js
@@ -108,6 +108,10 @@
 } from './socket-types.js';
 import { type ClientStore } from './store-ops-types.js';
 import type { SubscriptionUpdateResult } from './subscription-types.js';
+import type {
+  AddSyncedMetadataEntryPayload,
+  RemoveSyncedMetadataEntryPayload,
+} from './synced-metadata-types.js';
 import type { GlobalThemeInfo } from './theme-types.js';
 import type { ThreadActivityStore } from './thread-activity-types.js';
 import type {
@@ -1362,6 +1366,14 @@
         +type: 'ADD_COMMUNITY',
         +payload: AddCommunityPayload,
       }
+    | {
+        +type: 'ADD_SYNCED_METADATA_ENTRY',
+        +payload: AddSyncedMetadataEntryPayload,
+      }
+    | {
+        +type: 'REMOVE_SYNCED_METADATA_ENTRY',
+        +payload: RemoveSyncedMetadataEntryPayload,
+      }
     | {
         +type: 'SET_ACTIVE_SESSION_RECOVERY',
         +payload: SetActiveSessionRecoveryPayload,
diff --git a/lib/types/synced-metadata-types.js b/lib/types/synced-metadata-types.js
--- a/lib/types/synced-metadata-types.js
+++ b/lib/types/synced-metadata-types.js
@@ -5,3 +5,12 @@
 export type SyncedMetadataStore = {
   +syncedMetadata: SyncedMetadata,
 };
+
+export type AddSyncedMetadataEntryPayload = {
+  +name: string,
+  +data: string,
+};
+
+export type RemoveSyncedMetadataEntryPayload = {
+  +name: string,
+};