# User Signals API

As of DT Exchange Android SDK version 8.4.2, publishers can submit first-party data (user signals) such as The Trade Desk UID2 tokens and LiveRamp envelopes. Submitting user signals provides DT with deeper insights into user behavior and publisher-specific metrics so that we can better target ads to your users and increase fill rates. Additionally, if you are mediating DT Exchange, implementation of User Signals remains the same, no matter which mediation platform you use. 

To submit user signals:

1. Ensure that you have integrated the latest DT Exchange Android SDK.\
   For the latest version, see [Integrating the Android SDK](https://docs.digitalturbine.com/dt-exchange/publishers/sdk-configuration/integrating-the-android-sdk).
2. For each [user signal](#h_01kd871ggetf9pv4c9pap41ygn) you want to submit, send the data as key-value pairs in the [`setExtraData` method ](#h_01kd871ggesvzdp618sc6d0r33)within the `InneractiveAdManager`.

{% hint style="info" %}

* To pass multiple user signals, call the method once for every data point you wish to send.
* Calling the `setExtraData` method with a key that has already been sent overwrites the previous value associated with that key.
  {% endhint %}

## Method Signature <a href="#h_01kd871ggesvzdp618sc6d0r33" id="h_01kd871ggesvzdp618sc6d0r33"></a>

{% code title="Java" %}

```java
public static void setExtraData(String key, String value)
```

{% endcode %}

## User Signals <a href="#h_01kd871ggetf9pv4c9pap41ygn" id="h_01kd871ggetf9pv4c9pap41ygn"></a>

Submit any of the following user signals as key-value pairs in the `setExtraData` method. The maximum value you can send is 512 characters.

| KEY  | VALUE                                                          |
| ---- | -------------------------------------------------------------- |
| UID2 | UID2.0 token from The Trade Desk                               |
| LRE  | <p>LiveRamp envelope.</p><p>Do not submit the LiveRamp ID.</p> |

## Example <a href="#h_01kd871ggee5nwxr3d8w69g4tk" id="h_01kd871ggee5nwxr3d8w69g4tk"></a>

{% code title="Java" %}

```java
  // Passing the first user signal

  InneractiveAdManager.setExtraData("UID2", "UID2.0_access_token");

  // Passing the second user signal

  InneractiveAdManager.setExtraData("LRE", "LiveRamp_envelope");
```

{% endcode %}

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