ExecuteCommandPayload

{
    "signer": {
        "public_key": "string",
        "nonce": 0,
        "signed_at": 0
    },
    "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
    "cmd": "string",
    "payment": 0,
    "params": {},
    "meta": {},
    "ctx": {
        "client_id": "string",
        "activity_id": "98dae057-958f-4b2f-9ed4-41f109afdc3f",
        "trace_id": "string",
        "env": "PROD"
    },
    "ack_at": "2019-08-24T14:15:22Z"
}