The payload sent from son-handler for the A1 based action had to be modified to support SDNR changes and A1-PMS as,

 {"closedLoopControlName":"ControlLoop-SONA1-7d4baf04-8875-4d1f-946d-06b874048b61","closedLoopAlarmStart":1668429667245,"closedLoopEventClient":"microservice.PCI","closedLoopEventStatus":"ONSET","target":"pnf.pnf-name","from":"PCIMS","version":"1.0.2","policyName":"SONA1","policyVersion":"1.0.2","payload":"{\"input\":{\"near-rt-ric-url\":\"[https://10.31.4.43:30294/a1-policy/v2/policies\",\"body\":{\"policy_id\":\"dd068d06-c100-441f-9ec7-f612d227ba6c\",\"policytype_id\":\"ANR\",\"ric_id\":\"a1-terminator\",\"policy_data\":{\"PNFName\":\"cucpserver2\",\"PLMNID\":\"RAN001\",\"CellID\":\"14655\",\"neighbours\":[

{\"PNFName\":\"cucpserver2\",\"PLMNID\":\"RAN001\",\"CellID\":\"10896\",\"ho-kpi1\":92}

,{\"PNFName\":\"cucpserver2\",\"PLMNID\":\"RAN001\",\"CellID\":\"10897\",\"ho-kpi1\":92},{\"PNFName\":\"cucpserver2\",\"PLMNID\":\"RAN001\",\"CellID\":\"14656\",\"ho-kpi1\":92}]},\"service_id\":\"\",\"transient\":false,\"status_notification_uri\":\"\"}}}","target_type":"PNF","requestID":"f15ab08f-9ab6-489e-8f2f-9acbea2fd13a","AAI":{"generic-vnf.prov-status":"ACTIVE","generic-vnf.is-closed-loop-disabled":"false","pnf.pnf-name":"cucpserver2"},"Action":"putA1Policy"}