问如何解码出来Modbus 数值？

我要的数据是这个： "data": "0103040076008A9A4E",

传上来的数据内容是：

{"phyPayload":"ACF0cPT/CR+sr44F/v8JH6xkcZd68/w=","txInfo":{"frequency":487300000,"modulation":"LORA","loRaModulationInfo":{"bandwidth":125,"spreadingFactor":12,"codeRate":"4/5","polarizationInversion": false}},"rxInfo":{"gatewayID":"rB8J//4GSXY=","rssi":-18,"loRaSNR":12.3,"channel":1,"rfChain":1,"board":0,"antenna":0,"location":null,"fineTimestampType":"NONE","context":"mm/KDQ==","uplinkID":"TTAYyzJhTuqNqAMzlZinyQ==","crcStatus":"CRC_OK"}}

我该如何解码？哪一个是Modbus数值？谢谢。

原始数据是：

{

"applicationID": "1",

"applicationName": "RS485toLora",

"devEUI": "ac1f09fffe058eaf",

"deviceName": "dev-ac1f09fffe058eaf",

"timestamp": 1647653688,

"fCnt": 77,

"fPort": 1,

"data": "0103040076008A9A4E",

"data_encode": "hexstring",

"adr": true,

"rxInfo": [

{

"gatewayID": "ac1f09fffe064976",

"loRaSNR": 13,

"rssi": -14,

"location": {

"latitude": 0,

"longitude": 0,

"altitude": 0

}

}

],

"txInfo": {

"frequency": 487100000,

"dr": 5

}

}