Something like this? Postmortem dump analyzer tool
One record from there reformatted for clarity:
{
"_meta_": {
"ts_system": 1723389566.189359,
"ts_monotonic": 892858.413041906,
"transport": {
"kind": "can",
"source_iface": "slcan0"
},
"priority": "nominal",
"transfer_id": 4,
"source_node_id": 0,
"destination_node_id": null,
"subject_id": 7509,
"dtype": "uavcan.node.Heartbeat.1.0",
"payload_hex": "44000000000000"
},
"uptime": 68,
"health": {
"value": 0
},
"mode": {
"value": 0
},
"vendor_specific_status_code": 0
}