Czy ktos ma wiedze na temat formatu plikow JSON dla Perfetto UI lub starszego The Trace Event Profiling Tool (about:tracing) ?

Mam taki trace:

{
"traceEvents": [
{ "pid":2, "tid":2, "ts":0, "dur":10, "ph":"X", "name":"TASK 1, NODE 1", "args":{}, "cname": "yellow" },
{ "pid":1, "tid":1, "ts":0, "dur":15, "ph":"X", "name":"TASK 1, NODE 2", "args":{}, "cname": "white" },
{ "pid":1, "tid":1, "ts":18, "dur":20, "ph":"X", "name":"TASK 2, NODE 1", "args":{}, "cname": "black" }
],
"metauser":