Authorization error in IOT service API

Hi,

I am trying to use HCP IOT services from my HCP trial account and facing authorization issue.

Scenario:

I have created Message type , device and generated access token using Internet of Things Services Cockpit.

Device Id : 2681b140-2059-4c5a-bbd2-b0d5b1ec9065

Generated OAuth access token: <generated token id>

Message type ID: 0050558a0e149633b238

I posted the messages using message management section of Internet of Things Services Cockpit with below settings and it worked fine.

HTTP endpoint:  https://iotmmsi072166trial.hanatrial.ondemand.com/com.sap.iotservices.mms/v1/api/http/data/2681b140-2059-4c5a-bbd2-b0d5b1ec9065

Message to post: {"mode":"sync","messageType":"0050558a0e149633b238","messages":[{"PowerConsumed":27,"timestamp":1413191650}]}

HCP IOT cockpit test screen shots:

But when, I tried to send messages using google postmen client with below settings, I got authorization error.

URL: https://iotmmsi072166trial.hanatrial.ondemand.com/com.sap.iotservices.mms/v1/api/http/data/2681b140-2059-4c5a-bbd2-b0d5b1ec9065

Method: POST

Header Parameters:

Authorization: Bearer <access token generated from device>

Message body raw:

{"mode":"sync","messageType":"0050558a0e149633b238","messages":[{"PowerConsumed":27,"timestamp":1413191650}]}

Google postman screen shots:

Thanks,

Mukesh