Unable to Validate the URI provided in REST API documentation

Hi Team, I am trying to use the REST APIs to Integrate Silanis with my application. Before I code any API URL in my program, I want to test and validate URIs using PostMan Client. I have tried couple of sample programs shared in Developers blogs and are working fine, But write the code to meet my requirement I should be able to get a feel of the URLs by testing them in PostMan client, But note of the URI are working for me. I am sure definitely, I am missing something. Can some body please point me to correct resource/samples showing where to pick up the request payload and how to customize etc. I am using "http://docs.e-signlive.com/mc/content/c_esignlive_integrator_s_guide/rest_api/packages.htm" I have tried to query the packate status using postman and got the below error. "Unexpected 'T'" ( See the attachment) Any help you be greatly appreciated. Thanks Srikanth Srigiri.