Document upload to package using REST API failing

I have done multiple trials and not able to end up with successful results for uploading a document to a Transaction. I am using REST API and here is the RAW request ----Request---- POST https://sandbox.esignlive.com/api/packages/ggj1mkdQEWLsmP1tsWSj7T9sbjQ=/documents HTTP/1.1 Host: sandbox.esignlive.com Connection: keep-alive Content-Length: 186008 Accept: text/html Cache-Control: no-cache Origin: chrome-extension://fhbjgbiflinjbdggehcddcbncdddomop Authorization: Basic XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36 Postman-Token: c2b02825-5b51-ec7d-a7d2-4c42d489d6d3 Content-Type: multipart/form-data; boundary=----WebKitFormBoundary3r8scFGChPRPOO4u Accept-Encoding: gzip, deflate, br Accept-Language: en-US,en;q=0.8 ------WebKitFormBoundary3r8scFGChPRPOO4u Content-Disposition: form-data; name="file"; filename="cleaning_contract.pdf" Content-Type: application/pdf %PDF-1.6 % 179 0 obj 185295 %%EOF ------WebKitFormBoundary3r8scFGChPRPOO4u-- ---Response--- HTTP/1.1 302 Found Server: nginx Date: Tue, 08 Aug 2017 01:18:10 GMT Content-Length: 0 Connection: keep-alive X-Powered-By: Undertow Location: https://sandbox.esignlive.com/error?error=eyJtZXNzYWdlS2V5IjoiZXJyb3IuaW50ZXJuYWwuZGVmYXVsdCIsIm1lc3NhZ2UiOiJVbmV4cGVjdGVkIGVycm9yLiBXZSBhcG9sb2dpemUgZm9yIGFueSBpbmNvbnZlbmllbmNlIHRoaXMgbWF5IGhhdmUgY2F1c2VkIHlvdSwgcGxlYXNlIHRyeSBhZ2Fpbi4gSWYgdGhlIHByb2JsZW0gcGVyc2lzdHMsIHBsZWFzZSBjb250YWN0IG91ciBzdXBwb3J0IHRlYW0uIiwiY29kZSI6NTAwLCJuYW1lIjoiVW5oYW5kbGVkIFNlcnZlciBFcnJvciJ9 P3P: CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT" Strict-Transport-Security: max-age=31536000; includeSubdomains; I was following the Postman example, I tried with and without JSON payload about fields, but still document is not getting uploaded to Transaction. Can we get any possible guidance on this issue ?