platform_id, and the assignee is identified by assigned_id. Use is_team to control whether the assignee is treated as a Team or an individual Agent.platform_id (the contact) — a phone number (e.g. 966544444444) or a contact ID (e.g. 8347).assigned_id (the assignee) — a numeric agent/team ID (e.g. 324) or an email (e.g. omar@twerlo.com).is_team to true to assign to a Team, or false (default) to assign to an individual Agent. IDs can be retrieved from their respective listing endpoints before calling this one.