Acknowledgement

All api calls will respond with a http 200 status code with the following json

{
    "status": "ACK" // can be `NACK`
}

ACK means the request is accepted by POA and you should expect an on_action callback. NACK means either the request validation failed or POA doesn't want to respond - you should not expect an on_action callback.

Similarly, on receiving on_action callbacks from POA, you should respond with an ACK as an acknowledgement for the receipt. If you are not able to consume the callback message due to incorrect format or for any other reasons, respond with NACK status.