quickfix: base request body to json

Author: MrLightful

braspag_sdk/utils/base_request.py

@@ -5,6 +5,7 @@
 from future.utils import raise_with_traceback
 from requests import Request, Session
 
+from braspag_sdk import ObjectJSON
 from braspag_sdk.apps.payments.data import MerchantCredentials
 
 
@@ -27,7 +28,7 @@ def send_request(self, method, uri, data=None, params=None):
 
         if not body:
             headers['Content-Length'] = '0'
-        elif not isinstance(data, str):
+        elif isinstance(data, ObjectJSON):
             body = body.toJSON()
 
         if 'Content-Type' not in headers: