post
https://{yourAccountName}.api-us1.com/api/3/segmentMatchAll
Find all Contact Id's that match the given Segment. The provided segment will be saved with a 24 hour TTL. A new match-all request will be initiated. If results are not ready within 4 seconds, a response that lacks a result-set will be returned. Use the returned segmentId and runId to poll and check back later to see if the result-set is ready.