{
    "0": {
        "id": "2287947",
        "chattime": "1544102153",
        "chat": "Finalizado",
        "chattype": "text",
        "media": "",
        "outgoing": "0",
        "bot": "0",
        "unread": "1",
        "email_created": ""
    },
    "1": {
        "id": "2287931",
        "chattime": "1544102141",
        "chat": "asdasdasd",
        "chattype": "text",
        "media": "",
        "outgoing": "1",
        "bot": "0",
        "unread": "0",
        "email_created": "api"
    }
}

<div *ngFor="let chat of chats">
{{chat.id}}
</div>