> For the complete documentation index, see [llms.txt](https://docs.truecaller.com/truecaller-for-business/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.truecaller.com/truecaller-for-business/verified-campaigns/api-webhook-documentation/campaign-payload/sticky-message-id.md).

# Sticky Message ID

Message ID is a sticky notification that comes up for Truecaller users, capturing their attention for every transactional notification they receive. This touchpoint not only ensures timely and relevant messaging but also delivers business outcomes by enhancing user engagement and interaction with your brand.

{% hint style="info" %}
To create the JSON payload structure needed for your webhook connectors, use the DIY Template Generator tool within the Verified Campaigns tab on the Truecaller for Business. The tool helps you to create the appropriate template in two simple steps. 
{% endhint %}

**Below are the required payload parameters for each Template Style on the Message ID screen :**

**profile** section parameters are **Mandatory** for all webhook payloads :

* **campaign\_id** : External campaign reference ID
* **receiver\_number** : Phone numbers of the end user to whom the communication should be delivered.

**content** section parameters can vary based on display\_unit and template\_style as follows : *\* means mandatory*

| Template 1 - Text only | Template 2 - Image Banner only | Template 3 - Personalised content with image banner on left | Template 4 - Personalised content with image banner on right |
| ---------------------- | ------------------------------ | ----------------------------------------------------------- | ------------------------------------------------------------ |
| “display\_unit”\*      | “display\_unit”\*              | “display\_unit”\*                                           | “display\_unit”\*                                            |
| "title"\*              | "deeplink"\*                   | "title"\*                                                   | "title"\*                                                    |
| "call\_to\_action"\*   | "ttl"                          | "call\_to\_action"\*                                        | "call\_to\_action"\*                                         |
| "deeplink"\*           |                                | "deeplink"\*                                                | "deeplink"\*                                                 |
| "ttl"                  |                                | "ttl"                                                       | "ttl"                                                        |


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