# Verify event

After the event was emitted, the next step is to receive proof of the event. Signer is responsible to create a signature as proof of the event. 

Create `POST /sign-event` [request](/for-developers/cross-chain-messaging-protocol/how-it-works/signer-service/signer-interface.md) to the Signer. 

For our example, the request body would be:

```json
{
  "chainId": 1,
  "txHash": "0x9f89aae86d1b69cf63065bfc9f30478b6dc613b4655a857bc115a1275604b88c",
  "abi": {
    "anonymous": false,
    "inputs": [
        {
            "indexed": false,
            "name": "message",
            "type": "string"
        }
    ],
    "name": "MyMessage",
    "type": "event"
  }
}
```

As a result of the request, we receive the following object:

<pre class="language-json"><code class="lang-json"><strong>{
</strong>  "chainId": 1,
  "txHash": "0x9f89aae86d1b69cf63065bfc9f30478b6dc613b4655a857bc115a1275604b88c",
  "eventHash": "0x32b5aaa307499c5f926182bcb425d152e9d17e0c38ad46aecfc8b3007005221d",
  "signature": "0xc7067dbae67fe37d68945b4d32d636c02590d4e0da3dcd87616356178afc3d6b048ea054954bce2e5d2d853e379bc4f8fc16f6c0cb68de50cee844407806e09a1b",
  "signer": "0x86f3b7f305f9d02e243a28445a15ecb6eeb12288",
  "params": [
    "MyMessage",
    1,
    "0x1170490264E8c604E0D0861B76768A9e9a300b02",
    "0x9f89aae86d1b69cf63065bfc9f30478b6dc613b4655a857bc115a1275604b88c",
    "Hello World"
  ]
}
</code></pre>

The signature is created, therefore we can move to the last step.


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