Fix extra_params response type

[koksalkapucuoglu]

Fix extra_params response type

Description

The extra_parameters field in the entries does not come as json, but as a string.

Data Type Changes:

"extra_parameters": { "/user_id/": "/5555555/", "/screen_name/": "/test/", }

to

"extra_parameters": { "user_id": "5555555", "screen_name": "test" }