# FAQ

### What does the payload look like?

When an event is sent using `edgetag('tag', ...)` the event payload will have the following structure:

```typescript
type TagPayload = {
    action: 'tag'
    payload: EventPayload
    user: {
        userId: string
        session?: string
        email?: string
        phone?: string
        firstName?: string
        lastName?: string
        // ... additional user properties
    }
    query: Record<string, string>
    customData: Record<string, string>
}

type EventPayload = {
    eventId: string
    eventName: string
    timestamp: number
    pageUrl: string
    pageTitle: string
    userAgent: string
    data: {
      orderId?: string // present if the event is a conversion event
      contents?: ContentItem[] // present if the event contains items in the payload
    }
    // ... additional event properties
}
```

When user data is associated with the user using the `edgetag('user', ...)` or `edgetag('data', ...)` calls, the payload will be slightly different:

```typescript
type UserPayload = {
    action: 'user'
    payload: UserPayload
    user: {
        userId: string
        session?: string
    }
}

type UserPayload = {
    timestamp: number
    pageUrl: string
    pageTitle: string
    userAgent: string
    email?: string
    phone?: string
    firstName?: string
    lastName?: string
    // ... additional user and custom properties
}
```


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