Controlling Auto Commit

Hello,
I am new to Snap logic, I am trying to create a pipeline where I need to pass the json input request payload. based on the input I have to check for condition and then route to TWO different REST GET calls.
my input json is like this
{
“state”: “sample_state”,
“count”: “sample_count”,
“Caller”: “sample_caller”,
“fromDate”: “sample_fromdate”,
“toDate”: “sample_todate”,
“SysId”: “sample_sysid”
}
how to pass this from external app. And how to read the values to pass to REST GET call.
Answer will help a lot. Thanks