diff --git a/backend/app/api/v1/tasks.py b/backend/app/api/v1/tasks.py
index 0d587ca8..92ee9b8e 100644
--- a/backend/app/api/v1/tasks.py
+++ b/backend/app/api/v1/tasks.py
@@ -39,8 +39,8 @@ def generate_task(request: protocol_schema.TaskRequest) -> protocol_schema.Task:
                 detail="Invalid request type.",
             )
     logger.info(f"Generated {task=}.")
-    if request.user_id is not None:
-        task.addressed_users = [request.user_id]
+    if request.user is not None:
+        task.addressed_users = [request.user]
 
     return task
 
@@ -112,21 +112,21 @@ def post_interaction(
     match (type(interaction)):
         case protocol_schema.TextReplyToPost:
             logger.info(
-                f"Frontend reports text reply to {interaction.post_id=} with {interaction.text=} by {interaction.user_id=}."
+                f"Frontend reports text reply to {interaction.post_id=} with {interaction.text=} by {interaction.user=}."
             )
             # here we would store the text reply in the database
             return protocol_schema.TaskDone(
                 reply_to_post_id=interaction.user_post_id,
-                addressed_users=[interaction.user_id],
+                addressed_users=[interaction.user],
             )
         case protocol_schema.PostRating:
             logger.info(
-                f"Frontend reports rating of {interaction.post_id=} with {interaction.rating=} by {interaction.user_id=}."
+                f"Frontend reports rating of {interaction.post_id=} with {interaction.rating=} by {interaction.user=}."
             )
             # here we would store the rating in the database
             return protocol_schema.TaskDone(
                 reply_to_post_id=interaction.post_id,
-                addressed_users=[interaction.user_id],
+                addressed_users=[interaction.user],
             )
         case _:
             raise HTTPException(
diff --git a/backend/app/schemas/protocol.py b/backend/app/schemas/protocol.py
index 34ef571f..e72a7388 100644
--- a/backend/app/schemas/protocol.py
+++ b/backend/app/schemas/protocol.py
@@ -13,11 +13,16 @@ class TaskRequestType(str, enum.Enum):
     rate_summary = "rate_summary"
 
 
+class User(BaseModel):
+    id: str
+    name: str
+
+
 class TaskRequest(BaseModel):
     """The frontend asks the backend for a task."""
 
     type: TaskRequestType = TaskRequestType.generic
-    user_id: Optional[str] = None
+    user: Optional[User] = None
 
 
 class Task(BaseModel):
@@ -25,7 +30,7 @@ class Task(BaseModel):
 
     id: UUID = pydantic.Field(default_factory=uuid4)
     type: str
-    addressed_users: Optional[list[str]] = None
+    addressed_users: Optional[list[User]] = None
 
 
 class TaskResponse(BaseModel):
@@ -81,10 +86,10 @@ AnyTask = Union[
 
 
 class Interaction(BaseModel):
-    """An interaction is a message from the frontend to the backend."""
+    """An interaction is a user-generated action in the frontend."""
 
     type: str
-    user_id: str
+    user: User
 
 
 class TextReplyToPost(Interaction):
diff --git a/text-frontend/__main__.py b/text-frontend/__main__.py
index 5810d436..0029031f 100644
--- a/text-frontend/__main__.py
+++ b/text-frontend/__main__.py
@@ -38,7 +38,7 @@ def main(backend_url: str, api_key: str):
                         "post_id": "1234",
                         "user_post_id": "5678",
                         "text": summary,
-                        "user_id": "1234",
+                        "user": {"id": "1234", "name": "John Doe"},
                     },
                 )
                 tasks.append(new_task)
@@ -60,7 +60,7 @@ def main(backend_url: str, api_key: str):
                         "type": "post_rating",
                         "post_id": "1234",
                         "rating": rating,
-                        "user_id": "1234",
+                        "user": {"id": "1234", "name": "John Doe"},
                     },
                 )
                 tasks.append(new_task)