Decode LORAWAN packet coming from LORA GATEWAY

I have configured a lora gateway RG1xx LAIRD to forward packet through MQTT. i received the packets in my broker in the format bellow
{“rxInfo”:{“mac”:“xxxxxxxxx”,“time”:“0001-01-01T00:00:00Z”,“timestamp”:2567694595,“frequency”:868100000,“channel”:0,“rfChain”:1,“crcStatus”:1,“codeRate”:“4/5”,“rssi”:-114,“loRaSNR”:-8.5,“size”:23,“dataRate”:{“modulation”:“LORA”,“spreadFactor”:7,“bandwidth”:125}},“phyPayload”:"//8AAP9WAd0AAAAAAAAAAAAxwxY3FkU="}

please any idea about a program or a tool that decode theses packet and return the exact string coming from LORA IOT device

That’s the purpose of loraserver and lora-app-server, right?

There was a discussion on manually decrypting it here recently: