{
  "sourceObjectName": "Customer__dll",
  "targetObjectName": "Customer_Profile__dlm",
  "fieldMappings": [
    {
      "sourceFieldName": "External_Id_c",
      "targetFieldName": "External_Id_c__c"
    },
    {
      "sourceFieldName": "Preferred_Tier_c",
      "targetFieldName": "Preferred_Tier_c__c"
    }
  ]
}