title: How to create new connections using rally Webservice API
body: <p>I want to post a new connection to a user story via Rally API; but, I keep getting errors messages. what could I be doing wrong?</p>
  
  <p>I tried using this API endpoint: 
   <code>https://rally1.rallydev.com/slm/webservice/v2.0/changeset/create</code> with <code>Content-Type: text/plain</code></p>
  
  <pre><code>{
    "Changeset": {
    "Message":"another test"
    }
  }
  </code></pre>
  
  <p>and I got this response</p>
  
  <pre><code>{
      "CreateResult": {
          "_rallyAPIMajor": "2",
          "_rallyAPIMinor": "0",
          "Errors": [
              "Validation error: Changeset.SCMRepository should not be null"
          ],
          "Warnings": []
      }
  }
  </code></pre>
  
  <p>then I tried this below</p>
  
  <pre><code>{
    "Changeset": {
    "Message":"another test",
    "SCMRepository": {
      "ObjectName": "TestGithubRallyIntegration"
      }
    }
  }
  </code></pre>
  
  <p>and got </p>
  
  <pre><code>{
      "CreateResult": {
          "_rallyAPIMajor": "2",
          "_rallyAPIMinor": "0",
          "Errors": [
              "Cannot parse object reference from \"{\"SCMRepository\": {\"ObjectName\": \"TestGithubRallyIntegration\"}}\""
          ],
          "Warnings": []
      }
  }
  </code></pre>
  
  <p>What could I be doing wrong?</p>