https://account-d.docusign.com/oauth/auth?response_type=code&scope=signature&client_id=1590cb04-f976-4b54-897d-157f5a711ed0&state=x39pm23rtf23&redirect_uri=https://dev.coplsaas.com.au/brokerdev/webservice/whservice/getdscode

POST /oauth/token HTTP/1.1
HOST: account-d.docusign.com
authorization: Basic MTU5MGNiMDQtZjk3Ni00YjU0LTg5N2QtMTU3ZjVhNzExZWQwOmQxNmY4MWM0LTI5OTktNGMwOC04M2E0LTBiNWZkMGQ0NWFmMA==
content-type: application/x-www-form-urlencoded
cookie: __RequestVerificationToken=ARd6NkNlsuk_YG75ReDu9eQB0; __RequestVerificationToken_L01l0=AbHSxThtrkGESzjnwo0t1c4B0; mest=eyJ0eXAiOiJNVCIsImFsZyI6IkhTMjU2Iiwia2lkIjoiZWUyMDVlYjctYWJiMS00MmRiLTlmNjktZWFmMTg3ZThjZTczIn0.AQcAAAABAAIAAgDOEodJwVSyT4aBM16dnM1UDQAkAAAAYTFiODA4ZDktNGRhNi00ODM0LTgzOTItNGY0OWI2MDZmYTQ3FQABAAAAEgACAAAAAwAAAHRzdgsAAABpbnRlcmFjdGl2ZTAAgGs6FN6p1UgIAAAqazTgqdVI.XdbTt-fuOvAGJZ068I9T9GvA6YhmeW3Uv4RfhZPzoOA
content-length: 656

grant_type=authorization_code&code=eyJ0eXAiOiJNVCIsImFsZyI6IlJTMjU2Iiwia2lkIjoiNjgxODVmZjEtNGU1MS00Y2U5LWFmMWMtNjg5ODEyMjAzMzE3In0.AQkAAAABAAYABwCAcToxpqrVSAgAgP3AeKaq1UgCAM4Sh0nBVLJPhoEzXp2czVQVAAEAAAAYAAEAAAAFAAAADQAkAAAAMTU5MGNiMDQtZjk3Ni00YjU0LTg5N2QtMTU3ZjVhNzExZWQwMACAcToxpqrVSBIAAQAAAAsAAABpbnRlcmFjdGl2ZQ.KCF4tKuyh2AhA_H2FGh5ps89lT82go376xigC_lvtE6W20FonRRsiWM8CL6Bie8iS7miorenX9nVaAP-We4qKjmP1vBwp_yMujltr46Oq8Bt43l2acTgIh0Ne9yUf2C5ER1CF0nY1lusdS_UrgbEDoR_ZuDm2yuDtF2CPJtSMxjuZjEm9pgGOr7jQOCuTcwQLJA0OpmP1Dth7yzodkt50bh3Tfk3M4LxQ-xOMo_VnBTsxW_Ybu29R7ACV1nUdXMabrJQ-qtddRNULQXvXCD-ynpHu6GU0CwzRNeph6YhfRgbdB4ptWkb6XWcG3gkCpx8yaxn7glt58OjkQDi2v8Abw

{
"error": "invalid_grant"
}