| customerId | integer <int64>  (IdParam)   >= 1    Example:  customerId=1  | 
| invoiceId | integer <int64>  (IdParam)   >= 1    Example:  invoiceId=1  | 
| billRunType | string (BillRunType)   Enum: "NORMAL" "ADHOC"   | 
| page required  | integer <int32>  (PageParam)   >= 1    Example:  page=1  | 
| pageSize required  | integer <int32>  (ResultsPerPageParam)   [ 1 .. 1000 ]  Results to return per page 
   Example:  pageSize=100  | 
| sort | string (SortParam)  Comma-delimited list of the fields to sort by - defaults to ascending order, suffix :desc to change 
   Example:  sort=id,name | name:desc  | 
| fields | string (FieldsParam)  Comma-delimited list of the field(s) to return if only a subset is required 
   Example:  fields=id,name  |