Combine list of dictionaries to single Data Store Entity

Hello team,

in my application for reporting i use a!exportDataStoreEntityToExcel smart service to download Excel report based on the filters selected. This part is working great. As a new requirement i need to limit the access, the users will be able to download report only for contracts which they created / they approved from sender side / they approved from receiver side. The way i tried to achieve this is to create an expression rule to query the entity, make queries with 3 different filters (when user is created, approver on sender side, approver on receiver side), save the results into 3 separate local variables, combine them into the final local variable which will be then used as the entity parameter in the excel smart service. But i am not able to cast it to proper format, all the time i receive an error message: Could not cast from ICH_V_ContractLineItemsReportCSV to Data Store Entity. Details: CastInvalid.

Example:

local!variable1:

cast(
  'type!{urn:com:appian:types:ICH}ICH_V_ContractLineItemsReportCSV?list',
a!queryEntity_22r2(
  fetchTotalCount: TRUE,
  entity: cons!ICH_ENTITY_V_ContractLineItemsReportCSV,
  query: a!query(
    selection: if(
      rule!GBL_isBlankOrEmpty(ri!fields),
      null,
      a!querySelection(
        columns: a!forEach(
          items: ri!fields,
          expression: a!queryColumn(field: fv!item)
        )
      )
    ),
    logicalExpression: a!queryLogicalExpression(
      ignoreFiltersWithEmptyValues: true,
      operator: "AND",
      filters: {
          
        
        a!queryFilter(
          field: "sBusinessOwner",
          operator: "in",
          value: ri!sBusinessOwner,
          applyWhen: rule!GBL_isNotBlank(ri!sBusinessOwner),
        ),
        a!queryFilter(
          field: "sFinanceOwner",
          operator: "in",
          value: ri!sFinanceOwner,
          applyWhen: rule!GBL_isNotBlank(ri!sFinanceOwner),
        ),
        a!queryFilter(
          field: "rBusinessOwner",
          operator: "in",
          value: ri!rBusinessOwner,
          applyWhen: rule!GBL_isNotBlank(ri!rBusinessOwner),
        ),
        a!queryFilter(
          field: "rFinanceOwner",
          operator: "in",
          value: ri!rFinanceOwner,
          applyWhen: rule!GBL_isNotBlank(ri!rFinanceOwner),
        ),
        a!queryFilter(
          field: "requestor",
          operator: "in",
          value: ri!createdBy,
          applyWhen: rule!GBL_isNotBlank(ri!createdBy),
        ),
        
        a!queryFilter(
          field: "childScheduleDate",
          operator: "<=",
          value: ri!childScheduleDate,
          applyWhen: 
            rule!GBL_isNotBlank(ri!childScheduleDate)
        ),
        
      },
      
    ),
    pagingInfo: if(
      rule!GBL_isBlankOrEmpty(ri!pagingInfo),
      a!pagingInfo(
        startIndex: 1,
        batchSize: 1500,
        
      ),
      ri!pagingInfo
    )
  )).data)

output format of this local!variable is List of CDT. But in the a!exportDataStoreEntityToExcel in the entity parameter its not workingwith error message: Expression evaluation error : Could not cast from ICH_V_ContractLineItemsReportCSV to Data Store Entity. Details: CastInvalid.

Is it possible to cast the local variable to output format which can be used in the excel smart service?

Thanks