Update a Specific PM Field Work Directive

{
  "PmfwdActualCostAmt": null,
  "PmfwdClvValueCode1": null,
  "PmfwdClvValueCode2": null,
  "PmfwdClvValueCode3": null,
  "PmfwdClvValueCode4": null,
  "PmfwdClvValueCode5": null,
  "PmfwdClvValueCode6": null,
  "PmfwdCmCode": null,
  "PmfwdCompCode": "001",
  "PmfwdDate": null,
  "PmfwdDesc": "This is a test entry",
  "PmfwdEstCostAmt": null,
  "PmfwdFlwpContactCode": null,
  "PmfwdFlwpPartnCode": null,
  "PmfwdFlwpPartnTypeCode": null,
  "PmfwdFollowupDate": null,
  "PmfwdFollowupDueDate": null,
  "PmfwdFollowupNotes": null,
  "PmfwdFollowupRequiredFlag": "N",
  "PmfwdFromContactCode": null,
  "PmfwdFromPartnCode": null,
  "PmfwdFromPartnTypeCode": null,
  "PmfwdFwdId": "FWD00001",
  "PmfwdNotToExceedCostAmt": null,
  "PmfwdProjCode": "14001",
  "PmfwdRecordStatus": null,
  "PmfwdRefDesc": null,
  "PmfwdRespStatusCode": null,
  "PmfwdStatusCode": null,
  "PmfwdSubject": null,
  "PmfwdToContactCode": null,
  "PmfwdToPartnCode": null,
  "PmfwdToPartnTypeCode": null,
  "PmfwdVUuid": "F33F0EFCD93924B0E05316821FAC81B7",
  "links": [
    {
      "rel": "self",
      "href": "http://mobtest.cmiccloudr12.com:80/cmictestrti/pm-rest-api/rest/1/pmfwd/F33F0EFCD93924B0E05316821FAC81B7",
      "name": "pmfwd",
      "kind": "item"
    },
    {
      "rel": "canonical",
      "href": "http://mobtest.cmiccloudr12.com:80/cmictestrti/pm-rest-api/rest/1/pmfwd/F33F0EFCD93924B0E05316821FAC81B7",
      "name": "pmfwd",
      "kind": "item"
    }
  ]
}