Patient Feed following google json feed

gistfile1.json

{
  "author": "MCI",
  "title": "Patients",
  "feedUrl": "http://emicro.uk.to:6881/api/v1/patients/updated-after/2014-01-10T08:10:41Z",
  "nextArchive": "http://emicro.uk.to:6881/api/v1/patients/updated-after/2015-01-19T10:08:05Z",
  "prevArchive": null,
  "entries": [
    {
      "id": "860e5faf-9db0-49f4-b25f-5f9d0a3bfa60",
      "publishedDate": "2015-01-19T08:20:29Z",
      "title": "Patient Update:5957292764356935681",
      "link": "https:/../v1/api/patients/5957292764356935681",
      "categories": [
        "patient"
      ],
      "content": {
        "health_id": "5957292764356935681",
        "updated_at": "2015-01-19T08:20:29Z",
        "change_set": {
          "confidential": "no",
          "sur_name": "Hasan"
        }
      }
    },
    {
      "id": "5f982a33-4454-4b74-9236-b8157aa8effd",
      "publishedDate": "2015-01-13T15:10:40.371+0530",
      "title": "Patient Update:5957322355381370881",
      "link": "https:/../v1/api/patients/5957322355381370881",
      "categories": [
        "patient"
      ],
      "content": {
        "health_id": "5957322355381370881",
        "updated_at": "2015-01-19T10:08:05Z",
        "change_set": {
          "present_address": {
            "address_line": "xyz",
            "division_id": "10",
            "district_id": "04",
            "upazila_id": "09",
            "area_mouja": "Dhanmondi",
            "village": "Lalmatia",
            "post_office": "Mohammadpur",
            "post_code": "1207",
            "country_code": "050"
          }
        }
      }
    }
  ]
}

entry.id should not be random. meaning, if a particular entry appears in 2 requests, both of them should have the same Id. For example, if I query for patients in 2 mins interval, and the same changeset appears in both the results, they should be identifiable as "same" by having same "changeset"/"entry" Id.