Adding News to D2L through valence - desire2learn

Question

I'm hoping I can get some help with adding news the D2L. I've tried a lot and have gotten to the point where I don't know what else to try.
The error I keep on getting is 404. So, I'm thinking that either something is wrong with the URL I'm trying, or the data I'm sending (or maybe content type that is being sent).
I saw that when adding news, you need to pass it a multipart/mixed POST body. So, I've tried changing my code to include that, but I'm still not sure what is going on.
I don't think it's a permissions thing because I'm supposed to have full access with this account (and it's not 403, but 404)
This is the data I'm trying to send.
Overall Content Type:
ContentType: multipart/mixed;boundary=6da451c7
Data Being Sent:
--6da451c7
Content-Type: application/json
{"Title":"Test News Title","Body":{"Text":"Testing Testing 123...Testing Testing","Html":"<p>Testing Testing 123...Testing Testing</p>"},"StartDate":"2013-11-17T20:07:11Z","EndDate":"2013-12-02T20:07:11Z","IsGlobal":false,"IsPublished":false,"ShowOnlyInCourseOfferings":false}
--6da451c7
And here is the URL i'm trying to POST data to (slightly modified to not include personal data).
https://gsutest.desire2learn.com/d2l/api/le/1.3/6606/news/?x_a={{TOKEN}}&x_b={{TOKEN}}&x_c={{TOKEN}}&x_d={{TOKEN}}&x_t={{TIMESTAMP}}
I'm not sure where to go from here, any help would be nice. I realize I could be creating my POST body data wrong, but I'm just not sure what to try.
Thanks!
----Edit----
Ran a POST using fiddler and captured this data
POST https://gsutest.desire2learn.com/d2l/api/le/1.3/6606/news?x_a={{APPID}}&x_b={{USERID}}&x_c=OR0KIlHnHChrBvhHT99HVkH4WrD9dw_uPlpTGzKOdXc&x_d=b_TmyIHdTOL3U5bkNa1UNn11S4Yg7Cc3GOBoI911gLE&x_t={{TIMESTAMP}} HTTP/1.1
Content-Type: multipart/mixed;boundary=1649e26b
Host: gsutest.desire2learn.com
Content-Length: 342
Expect: 100-continue
Connection: Keep-Alive
--1649e26b
Content-Type: application/json
{"Title":"Test News Title","Body":{"Text":"Testing Testing 123...Testing Testing","Html":"<p>Testing Testing 123...Testing Testing</p>"},"StartDate":"2013-11-19T21:07:03.838Z","EndDate":"2013-12-04T21:07:01.413Z","IsGlobal":false,"IsPublished":false,"ShowOnlyInCourseOfferings":false}
--1649e26b
----Edit #2----
Ran another POST using fiddler and captured this data. The data that I'm sending came from: http://docs.valence.desire2learn.com/basic/fileupload.html#simple-uploads (under the upload to news section)
POST https://gsutest.desire2learn.com:443/d2l/api/le/1.3/6606/news/?x_a={{APP_ID}}&x_b={{USER_ID}}&x_c=rdzAFVUE6xBS24N5nE_4Hf5sbwpvJH1OVJaK4Ow-XT8&x_d=TmadrEGw55aKwS1uuNo68kvaR_pvYLUWJdsFa7LhrEQ&x_t={{TIMESTAMP}}" HTTP/1.1
Content-Type: multipart/mixed;boundary=xxBOUNDARYxx
Host: gsutest.desire2learn.com:443
Content-Length: 270
--xxBOUNDARYxx
Content-Type: application/json
{"EndDate": null, "IsPublished": false, "ShowOnlyInCourseOfferings": false,"Title": "Test title", "Body": {"Text": "Test body text", "HTML": null},"StartDate": "2013-02-20T13:15:30.067Z", "IsGlobal": false}
--xxBOUNDARYxx
I'm still getting "HTTP/1.1 404 Not Found" as the response headers.

Answer 1

Using the data you provided, I discovered that you are missing the millisecond value in your UTCDateTime format. By adding a millisecond value of .067 and .068 to each of the dates, I am able to POST successfully. I did this by using the Getting Started Sample against an LMS where I have an Instructor account with privileges to POST News items.