Searching nested JSON to create audit dashboard

[Tylerdygert]

I have some test JSON data that I am having trouble searching for.
I need to create some Audit dashboards around this data and trying to find a way to search the field names has been pretty difficult. Any help would be appreciated.

I would like to be able to search something like this: | search PatientName= and addressLine1=

Here is one event that I have in splunk fully opened up:
{"Results":[{"Username":"Org FinAdmin","EntityName":"EPMS.Domain.Entities.Account","DateTime":"2019-12-02T19:03:48.1452368Z","EntityID":"200000032","ParentEntity":"","ParentEntityID":"0","ChangeType":"Modified","ChangeDetails":[{"FieldName":"AccountGroupId","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"AccountTypeId","OldValue":"132","NewValue":"132","$type":"AuditChangeDetail"},{"FieldName":"BalanceDue","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"BalanceDueLate120","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"BalanceDueLate150","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"BalanceDueLate30","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"BalanceDueLate60","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"BalanceDueLate90","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"BalanceDueLateMax","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"CreatedByProgram","OldValue":"epmsApplication","NewValue":"epmsApplication","$type":"AuditChangeDetail"},{"FieldName":"CreatedByUser","OldValue":"Org FinAdmin","NewValue":"Org FinAdmin","$type":"AuditChangeDetail"},{"FieldName":"CreatedDateTime","OldValue":"12/2/2019 7:03:47 PM","NewValue":"12/2/2019 7:03:47 PM","$type":"AuditChangeDetail"},{"FieldName":"FinancialClassId","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"GuarantorId","OldValue":"21737061","NewValue":"21737061","$type":"AuditChangeDetail"},{"FieldName":"GuarantorName","OldValue":"","NewValue":"","$type":"AuditChangeDetail"},{"FieldName":"IsAssessFinanceCharge","OldValue":" ","NewValue":" ","$type":"AuditChangeDetail"},{"FieldName":"IsNewAccount","OldValue":" ","NewValue":" ","$type":"AuditChangeDetail"},{"FieldName":"IsPatient","OldValue":"True","NewValue":"True","$type":"AuditChangeDetail"},{"FieldName":"IsSendNewsLetter","OldValue":" ","NewValue":" ","$type":"AuditChangeDetail"},{"FieldName":"LastChargeDate","OldValue":"1/1/1940 12:00:00 AM","NewValue":"1/1/1940 12:00:00 AM","$type":"AuditChangeDetail"},{"FieldName":"LastInsurancePayment","OldValue":"1/1/1940 12:00:00 AM","NewValue":"1/1/1940 12:00:00 AM","$type":"AuditChangeDetail"},{"FieldName":"LastPaymentDate","OldValue":"1/1/1940 12:00:00 AM","NewValue":"1/1/1940 12:00:00 AM","$type":"AuditChangeDetail"},{"FieldName":"LastStatementDate","OldValue":"1/1/1940 12:00:00 AM","NewValue":"1/1/1940 12:00:00 AM","$type":"AuditChangeDetail"},{"FieldName":"MigratedOn","OldValue":null,"NewValue":null,"$type":"AuditChangeDetail"},{"FieldName":"ModifiedByProgram","OldValue":"epmsApplication","NewValue":"epmsApplication","$type":"AuditChangeDetail"},{"FieldName":"ModifiedByUser","OldValue":"Org FinAdmin","NewValue":"Org FinAdmin","$type":"AuditChangeDetail"},{"FieldName":"ModifiedDateTime","OldValue":"12/2/2019 7:03:47 PM","NewValue":"12/2/2019 7:03:48 PM","$type":"AuditChangeDetail"},{"FieldName":"MonthToDateCharges","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"MonthToDateDirectPayments","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"MonthToDatePayments","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"NoteChanged","OldValue":"1/1/1940 12:00:00 AM","NewValue":"1/1/1940 12:00:00 AM","$type":"AuditChangeDetail"},{"FieldName":"RecordNotesId","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"RecordStatus","OldValue":" ","NewValue":" ","$type":"AuditChangeDetail"},{"FieldName":"RecordStatusChangeDate","OldValue":"1/1/1940 12:00:00 AM","NewValue":"1/1/1940 12:00:00 AM","$type":"AuditChangeDetail"},{"FieldName":"ReferenceCodeId","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"ResidenceName","OldValue":"","NewValue":"","$type":"AuditChangeDetail"},{"FieldName":"ResidentPersonCode","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"SeparateStatementId","OldValue":"0","NewValue":"0","$type":"AuditChangeDetail"},{"FieldName":"StatusId","OldValue":"1","NewValue":"1","$type":"AuditChangeDetail"}],"$type":"Auditable"}],"$type":"AuditResults"}