FIX:nsc id 类型改为str

@@ -17,7 +17,7 @@ params = {
     'invoiceNumber': fields.Str(required=True, validate=validate.Length(max=64)),
     'invoiceNumber': fields.Str(required=True, validate=validate.Length(max=64)),
     'issueDate': CustomDate(required=True),
     'issueDate': CustomDate(required=True),
     'buyerName': fields.Str(required=True, validate=validate.Length(max=64)),
     'buyerName': fields.Str(required=True, validate=validate.Length(max=64)),
-    "buyerId": fields.Int(required=True),
+    "buyerId": fields.Str(required=True, validate=validate.Length(max=64)),
     'vin': fields.Str(required=True, validate=validate.Length(max=128)),
     'vin': fields.Str(required=True, validate=validate.Length(max=128)),
     'dealer': fields.Str(required=False, validate=validate.Length(max=64)),
     'dealer': fields.Str(required=False, validate=validate.Length(max=64)),
     'priceWithVat': CustomDecimal(required=True),
     'priceWithVat': CustomDecimal(required=True),