Add context data to an issue - Use a script, command, or playbook to add context data to an issue to be used in playbooks or other automations. - Administrator Guide - Cortex XDR - Cortex - Security Operations

The following example adds the key and value hello:world to the issue context data.

demisto.executeCommand("Set", {"key":"hello", "value":"world"})

An issue's context data contains the following values:

{  
   "Account":
    {
      "firstName": "Bob",
      "lastName": "Jones",
    }
}

For an automation, you need to use the full name value. You can use the Set script to add an new fullName value to the JSON:

Result:

{  
   "Account":
    {
      "firstName": "Bob",
      "fullName": "Bob Jones"
      "lastName": "Jones",
    }
}