Assignment Access Credential -- Mutate

{
    "assignee": "string",
    "occurred_at": "string",
    "credentials": [
        {
            "id": "string",
            "due_date": "string",
            "assign_id": "string"
        }
    ],
    "metadata": {
        "condition": "string",
        "notes": "string"
    },
    "confirmation": {
        "type": "paper",
        "context": [
            {
                "type": "email",
                "destination": "string"
            }
        ]
    }
}