Update a specific position

"{\r\n    \"PosActiveFlag\": \"N\",\r\n    \"PosAllowEtimeEntryFlag\": null,\r\n    \"PosCode\": \"1234567903\",\r\n    \"PosCtrlPos\": null,\r\n    \"PosDefaultJobTitle\": null,\r\n    \"PosDescription\": \"Application Developer\",\r\n    \"PosEeoClass\": \"008\",\r\n    \"PosEeoClassDesc\": \"Personnel & Labor Relation Mgr\",\r\n    \"PosExpiryDate\": null,\r\n    \"PosFlsaExemptFlag\": \"E\",\r\n    \"PosFlsaExemptFlagDesc\": \"Exempt\",\r\n    \"PosGradeCode\": \"H\",\r\n    \"PosGradeDesc\": \"high Quality\",\r\n    \"PosHrpdCode\": \"OFFICE\",\r\n    \"PosHrpdDesc\": \"Internal Office Position\",\r\n    \"PosHrweCode\": \"OUT-ALL\",\r\n    \"PosHrweDesc\": \"Outside All Seasons\",\r\n    \"PosIuCreateDate\": \"2026-05-14T14:18:02-04:00\",\r\n    \"PosIuCreateUser\": \"FARHA\",\r\n    \"PosIuUpdateDate\": \"2026-05-14T14:18:38-04:00\",\r\n    \"PosIuUpdateUser\": \"FARHA\",\r\n    \"PosJobSummary\": null,\r\n    \"PosLastUpdDate\": \"2026-05-14T14:18:38-04:00\",\r\n    \"PosResponsibilities\": null,\r\n    \"PosSafeCertFlag\": \"Y\",\r\n    \"PosShortDesc\": \"App Dev\",\r\n    \"PosStatusCode\": null,\r\n    \"PosTradeCode\": null,\r\n    \"PosTrainDesc\": \"Trainee\",\r\n    \"PosTrainType\": \"2\",\r\n    \"PosUser\": \"FARHA\",\r\n    \"PosVUuid\": \"51CC1AF37736A17EE0630B811DAC7213\",\r\n    \"links\": [\r\n        {\r\n            \"rel\": \"self\",\r\n            \"href\": \"https://dev7v12mob.cmic.ca:443/cmicdevv12/hcm-rest-api/rest/1/HrPositionsMaster/51CC1AF37736A17EE0630B811DAC7213\",\r\n            \"name\": \"HrPositionsMaster\",\r\n            \"kind\": \"item\"\r\n        },\r\n        {\r\n            \"rel\": \"canonical\",\r\n            \"href\": \"https://dev7v12mob.cmic.ca:443/cmicdevv12/hcm-rest-api/rest/1/HrPositionsMaster/51CC1AF37736A17EE0630B811DAC7213\",\r\n            \"name\": \"HrPositionsMaster\",\r\n            \"kind\": \"item\"\r\n        }\r\n    ]\r\n}"