Common Request Parameter (Http Request Header)

Name	Data Type	Mandatory	Description
tenant_id	String	Y	tenant id of OMS4. Require to ask customer support of OMS4 to provide tenant_id.
api_key	String	Y	api key which is issued by OMS4 for each of fulfillment point/sales channel
timestamp	Long	Y	The time stamp of the request e.g. 1517820392000
signature	String	Y	Signature by using HMAC hash algorithm.