> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Message real-time messages type

> Message type delivered by ReceiveMessage on the PlayFab real-time messages SignalR Hub, carrying a topic string, binary payload, and TraceContext traceId.

<Note>
  The REST and SignalR APIs documented here are more complex than the client SDKs. Consider using the [Lobby C++ SDK](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/pflobby_members) or [Matchmaking C++ SDK](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmatchmaking/pfmatchmaking_members) instead, unless those SDKs don't meet your needs.
</Note>

```json theme={null}
{
    "topic": "Opaque~Topic~String~6183258",
    // payload is binary data, but when the message is serialized as JSON it will look like a base64 encoded string
    "payload": "eyJsb2JieUlkIjoiODEyNDZmY2ItMWVmNy00ZmU1LTliYzctZTg3MjBiNmFjNWIxIiwibG9iYnlDaGFuZ2VzIjpbeyJjaGFuZ2VOdW1iZXIiOjEsIm1lbWJlclRvTWVyZ2UiOnsibWVtYmVyRW50aXR5Ijp7IlR5cGUiOiJ0aXRsZV9wbGF5ZXJfYWNjb3VudCIsIklkIjoiOTgxRDU5MTcwRTI4NEE3MiJ9fX1dfQ==",
    "traceId": "4bf92f3577b34da6a3ce929d0e0e4736"
}
```

## Members

**`topic`**   string

A topic string, matching the topic string returned when [subscribing to
resources](/services/playfab/multiplayer/real-time-messages/subscribing-to-resources). This field allows the client to keep
track of which messages are for which resources they subscribed to.

Example: `Opaque~Topic~String~6183258`

**`payload`**   binary

The payload of the message.

Example:\
`7b 22 6c 6f 62 62 79 49 64 22 3a 22 38 31 32 34 36 66 63 62 2d 31 65 66 37 2d 34 66 65 35 2d 39 62 63 37 2d 65 38 37 32 30 62 36 61 63 35 62 31 22 2c 22 6c 6f 62 62 79 43 68 61 6e 67 65 73 22 3a 5b 7b 22 63 68 61 6e 67 65 4e 75 6d 62 65 72 22 3a 31 2c 22 6d 65 6d 62 65 72 54 6f 4d 65 72 67 65 22 3a 7b 22 6d 65 6d 62 65 72 45 6e 74 69 74 79 22 3a 7b 22 54 79 70 65 22 3a 22 74 69 74 6c 65 5f 70 6c 61 79 65 72 5f 61 63 63 6f 75 6e 74 22 2c 22 49 64 22 3a 22 39 38 31 44 35 39 31 37 30 45 32 38 34 41 37 32 22 7d 7d 7d 5d 7d`

**`traceId`**   string

A [W3C TraceContext trace-id](https://www.w3.org/TR/trace-context/#trace-id).
The client should log this field so it can be included if you need to send a bug
report to the PlayFab team.

Example: `4bf92f3577b34da6a3ce929d0e0e4736`

## See also

* Client method [ReceiveMessage](/services/playfab/multiplayer/real-time-messages/client-methods/receive-message)
* [Real-time messages SignalR Hub](/services/playfab/multiplayer/real-time-messages/signalr-hub)
* [Real-time messages for Lobby and Matchmaking APIs](/services/playfab/multiplayer/real-time-messages/overview)


## Related topics

- [SubscriptionChangeMessage real-time messages type](/services/playfab/multiplayer/real-time-messages/types/subscription-change-message.md)
- [EndSessionRequest real-time messages type](/services/playfab/multiplayer/real-time-messages/types/end-session-request.md)
- [EndSessionResponse real-time messages type](/services/playfab/multiplayer/real-time-messages/types/end-session-response.md)
- [SharedSessionRequest real-time messages type](/services/playfab/multiplayer/real-time-messages/types/shared-session-request.md)
- [SharedSessionResponse real-time messages type](/services/playfab/multiplayer/real-time-messages/types/shared-session-response.md)