## SmartHealthLinkPayload.key property [​](/content/docs/sdk/core.smarthealthlinkpayload.key#smarthealthlinkpayloadkey-property/index.html)

**Signature:**

```typescript
key: string;
```

- [SmartHealthLinkPayload.key property](/content/docs/sdk/core.smarthealthlinkpayload.key#smarthealthlinkpayloadkey-property/index.html)