You need to encode the data value.
e.g.:
"data": "{\"topic_title\":\"Test\",\"original_post_id\":2222,\"original_post_type\":1,\"original_username\":\"User.Name\",\"revision_number\":1,\"display_username\":\"Text\"}"
You need to encode the data value.
e.g.:
"data": "{\"topic_title\":\"Test\",\"original_post_id\":2222,\"original_post_type\":1,\"original_username\":\"User.Name\",\"revision_number\":1,\"display_username\":\"Text\"}"