diff --git a/mistralclient/api/v2/action_executions.py b/mistralclient/api/v2/action_executions.py
index 727f3f8..f613529 100644
--- a/mistralclient/api/v2/action_executions.py
+++ b/mistralclient/api/v2/action_executions.py
@@ -33,7 +33,7 @@ class ActionExecutionManager(base.ResourceManager):
             data['input'] = json.dumps(input)
 
         if params:
-            data['params'] = params
+            data['params'] = json.dumps(params)
 
         resp = self.client.http_client.post(
             '/action_executions',
diff --git a/mistralclient/tests/functional/cli/v2/cli_tests_v2.py b/mistralclient/tests/functional/cli/v2/cli_tests_v2.py
index 996b23e..86d8d8d 100644
--- a/mistralclient/tests/functional/cli/v2/cli_tests_v2.py
+++ b/mistralclient/tests/functional/cli/v2/cli_tests_v2.py
@@ -680,6 +680,34 @@ class ActionExecutionCLITests(base_v2.MistralClientTestBase):
         self.assertEqual(wf_name, self.direct_wf['Name'])
         self.assertEqual(status, 'SUCCESS')
 
+    def test_act_execution_create_delete(self):
+        action_ex = self.mistral_admin(
+            'run-action',
+            params="std.echo '{0}' --save-result".format(
+                '{"output": "Hello!"}')
+        )
+        action_ex_id = self.get_value_of_field(action_ex, 'ID')
+
+        self.assertTableStruct(action_ex, ['Field', 'Value'])
+
+        name = self.get_value_of_field(action_ex, 'Name')
+        wf_name = self.get_value_of_field(action_ex, 'Workflow name')
+        task_name = self.get_value_of_field(action_ex, 'Task name')
+
+        self.assertEqual('std.echo', name)
+        self.assertEqual('None', wf_name)
+        self.assertEqual('None', task_name)
+
+        action_exs = self.mistral_admin('action-execution-list')
+
+        self.assertIn(action_ex_id, [ex['ID'] for ex in action_exs])
+
+        self.mistral_admin('action-execution-delete', params=action_ex_id)
+
+        action_exs = self.mistral_admin('action-execution-list')
+
+        self.assertNotIn(action_ex_id, [ex['ID'] for ex in action_exs])
+
 
 class NegativeCLITests(base_v2.MistralClientTestBase):
     """This class contains negative tests."""