# Update Note

Update an existing note.

**Endpoint**: `PUT /api/media-items/notes/{note_id}`
**Auth**: Required
**Content-Type**: `application/json`

## Path Parameters

| Parameter | Type | Required | Description |
|-----------|------|-----------|-------------|
| note_id | string | Yes | Note UUID |

## Request Body

| Field | Type | Required | Description |
|--------|------|-----------|-------------|
| content | string | No | Updated note content |
| position | string | No | Updated location reference |

### Example Request

```json
{
  "content": "Updated note content",
  "position": "epubcfi(/6/4/2:20)"
}
```

## Response (200 OK)

```json
{
  "id": "uuid",
  "media_item_id": "uuid",
  "user_id": "uuid",
  "content": "Updated note content",
  "position": "epubcfi(/6/4/2:20)",
  "updated_at": "2026-01-31T10:00:00Z"
}
```

## Error Responses

| Code | Description |
|------|-------------|
| 400 | Invalid note data |
| 401 | Invalid or expired token |
| 403 | User does not own this note |
| 404 | Note not found |
