The body is expected to be valid JSON (as of www.jslint.com), the content-type is expected to be application/json
1POST/callback/jobbody as defined in "JOB POSTING DOWNLOAD" of "FMS API Integration Reference Guide 1.1". If StaffingOrder/OrderId/IdValue points to a known job, its an update operation. Otherwise its a creation operation.
2POST/callback/update-jobapplicationbody as defined in "WORKER DOWNLOAD" of "FMS API Integration Reference Guide 1.1"
3POST/callback/jobseekerlogbody as Json.