1) (optional) Initiate a Get inquiry to get Site ID, site name, URIs, and user details
URI to initiate the action GEThttps://login.eloqua.com/id
Response as it appears in Fiddler - JSON format: 
2) Initiate a POST request to create an Export definition:
URI to initiate the export: POSThttps://secure.eloqua.com/API/Bulk/1.0/contact/export?format=json
This time you have to provide the details of the fields and the data that you want to include in the export:
This could look something like this:
{"name":"Tarek.Naim",
"fields":{"ID":"{{Contact.Id}}",
"filter":{"filterRule":"VALUEEQUALSCOMPARISONVALUE",
"value":"{{Contact.Field(C_EmailAddress)}}","comparisonValue":"tarek.naim@oracle.com"},
"secondsToRetainData":
14400,"secondsToAutoDelete":14400,"kbUsed":0}
Response status should be 201 and should look something like:
3) Initiate a POST request to create a SYNC
POST https://secure.eloqua.com/API/Bulk/1.0/sync
Request Body: {"syncedInstanceUri":"/contact/export/14"}
Response would look something like this:
4) You can Poll the sync to make sure it's been created successfully:
URI: https://secure.eloqua.com/API/Bulk/1.0/sync/syncID
Response should indicate a success status
5) Initiate a Get request to get the data from the staging area:
GEThttps://secure.eloqua.com/API/Bulk/1.0/contact/export/EPORTID/data?page=1&pageSize=10&format=json
Response would show the data in the staging area