After your instrumentation is done, start your application

```bash
OTEL_EXPORTER_OTLP_HEADERS="signoz-ingestion-key={{SIGNOZ_INGESTION_KEY}}" nest start
```

&nbsp;

If you encounter any difficulties, please consult the [troubleshooting section](https://signoz.io/docs/instrumentation/nestjs/#troubleshooting-your-installation) for assistance.