Update a Specific SC Header

{
  "CChangeDesc": "Changes To Date",
  "CNewRevisedDesc": "New Revised",
  "COriginalDesc": "Original",
  "CRecievedDesc": "Revised",
  "CTitle1": "Original",
  "CTitle2": "Prior Changes",
  "CTitle3": "Current Change",
  "CTitle4": "Revised",
  "CUnpostedDesc": "Unposted Changes",
  "PartnTypeCode": "P",
  "PostOverrideFlag": "0",
  "ScmstAbbrevPartnCode": "0415",
  "ScmstAcctDescription": null,
  "ScmstActionCode": null,
  "ScmstAltVenAddCode": null,
  "ScmstAppCode": null,
  "ScmstArAmt": null,
  "ScmstBankAccount": "10001",
  "ScmstBankDept": "00",
  "ScmstBillCode": null,
  "ScmstCashAmt": null,
  "ScmstCdiFlag": "N",
  "ScmstChgCode": "000",
  "ScmstChqHandleCode": null,
  "ScmstCloseDate": null,
  "ScmstClvValueCode1": null,
  "ScmstClvValueCode2": null,
  "ScmstClvValueCode3": null,
  "ScmstClvValueCode4": null,
  "ScmstClvValueCode5": null,
  "ScmstClvValueCode6": null,
  "ScmstCmBudrCode": null,
  "ScmstCmChgCode": null,
  "ScmstCmCompCode": null,
  "ScmstCmJobCode": null,
  "ScmstCompCode": "001",
  "ScmstComplFlag": "Y",
  "ScmstContAmt": null,
  "ScmstContCode": "16-001.100",
  "ScmstContType": null,
  "ScmstContactCode": null,
  "ScmstContactName": null,
  "ScmstCorrespAddCode": null,
  "ScmstCreateContOnFlyFlag": "Y",
  "ScmstCurcFactorNum": 1,
  "ScmstCurrCode": "USD",
  "ScmstCurrName": "US Dollar",
  "ScmstDate": "2023-01-27",
  "ScmstDefaultTaxesFlag": "Y",
  "ScmstDesc": null,
  "ScmstDfltAmt": null,
  "ScmstDfltCatCode": null,
  "ScmstDfltPhsCode": null,
  "ScmstDoNotExceedAmt": null,
  "ScmstEndDate": null,
  "ScmstExecutedDate": null,
  "ScmstGcsPayRequestFlag": null,
  "ScmstGstAmt": null,
  "ScmstGstPc": 0,
  "ScmstHldbkPc": 10,
  "ScmstHldbkPcRule": null,
  "ScmstHldbkRlsFromSc": "Y",
  "ScmstHoldPaymentDays": 0,
  "ScmstHoldPaymentFlag": "Y",
  "ScmstImpactDays": null,
  "ScmstInvEntryState": "SC",
  "ScmstInvHldbkTaxFlag": "N",
  "ScmstIssuedDate": null,
  "ScmstIuCreateDate": "2023-01-28T02:24:38Z",
  "ScmstIuUpdateDate": "2023-01-28T02:24:38Z",
  "ScmstJobCode": "16-001",
  "ScmstJobCtrlCode": "ALL",
  "ScmstMainChgCode": null,
  "ScmstMainContCode": null,
  "ScmstMainVenCode": null,
  "ScmstName": "This is a test entry",
  "ScmstNonCreditInclTaxAmt": null,
  "ScmstNonCreditTaxAmt": null,
  "ScmstOrigBidpAmt": null,
  "ScmstOrigBidpOraseq": null,
  "ScmstOvrrideNotExceedFlag": null,
  "ScmstOverrideFlag": null,
  "ScmstPbContCode": null,
  "ScmstPbCustCode": null,
  "ScmstPostBatch": null,
  "ScmstPostDate": null,
  "ScmstPreferedQuoteFlag": "Y",
  "ScmstPrintedCoFlag": null,
  "ScmstProjOraseq": 11969424,
  "ScmstRating": null,
  "ScmstRctReferenceNum": null,
  "ScmstReceivedDate": null,
  "ScmstRecipientEmail": null,
  "ScmstRevBatch": null,
  "ScmstRevDate": null,
  "ScmstScControlAmt": null,
  "ScmstSchedExistsFlag": null,
  "ScmstScheduleFlag": "Y",
  "ScmstScopeDesc": null,
  "ScmstScschLastSeqNumUsed": 0,
  "ScmstSelfBilledFlag": "N",
  "ScmstSenderEmail": null,
  "ScmstSepVouPerJobFlag": "N",
  "ScmstSrcCode": null,
  "ScmstStartDate": null,
  "ScmstStatCode": "P",
  "ScmstStatusCode": "PENDING",
  "ScmstSubcontrCode": "NONE",
  "ScmstSubcontractorChgCode": null,
  "ScmstTax1Code": null,
  "ScmstTax2Code": null,
  "ScmstTax3Code": null,
  "ScmstTermCode": null,
  "ScmstTermName": null,
  "ScmstTexturaFlag": null,
  "ScmstUser": "CMICUSER",
  "ScmstUserPrvlgFlag": "Y",
  "ScmstVenCode": "0415",
  "ScmstVenName": "Supreme Electrical",
  "ScmstVUuid": "F34747BF47E14C0FE05316821FAC769E",
  "ScmstDepositAmt": 0,
  "ScmstDepositApprovalDate": null,
  "ScmstDepositPct": 0,
  "links": [
    {
      "rel": "self",
      "href": "http://mobtest.cmiccloudr12.com:80/cmictestrti/pm-rest-api/rest/1/scmast/F34747BF47E14C0FE05316821FAC769E",
      "name": "scmast",
      "kind": "item"
    },
    {
      "rel": "canonical",
      "href": "http://mobtest.cmiccloudr12.com:80/cmictestrti/pm-rest-api/rest/1/scmast/F34747BF47E14C0FE05316821FAC769E",
      "name": "scmast",
      "kind": "item"
    },
    {
      "rel": "enclosure",
      "href": "http://mobtest.cmiccloudr12.com:80/cmictestrti/pm-rest-api/rest/1/scmast/F34747BF47E14C0FE05316821FAC769E/enclosure/ScmstCommentLong",
      "name": "ScmstCommentLong",
      "kind": "other"
    }
  ]
}