## SubscriptionManager.(constructor)

Constructs a new instance of the `SubscriptionManager` class

**Signature:**

```typescript
constructor(medplum: MedplumClient, wsUrl: URL | string, options?: SubManagerOptions);
```

## Parameters

| Parameter | Type | Description |
| --- | --- | --- |
| medplum | [MedplumClient](/content/docs/sdk/core.medplumclient) |  |
| wsUrl | URL \| string |  |
| options | [SubManagerOptions](/content/docs/sdk/core.submanageroptions) | _(Optional)_ |