NEST : How to index raw JSON through Bulk API

Since IRawClient has been removed how we can index raw json documents through bulk API ?

OK apparently it has been renamed to .LowLevel.

Before indexing do we have to change any settings??
because when i tried
var response = client.LowLevel.IndicesCreatePost<FeedData>("feederapp", json);
it is throwing an error..

Unsuccessful low level call on POST: /feederapp?pretty=true
Audit trail of this API call:

  • BadResponse: Node: http://localhost:9200/ Took: 00:00:00.4116440
    ServerError: ServerError: 500Type: settings_exception Reason: "Failed to load settings from "json file content"
    "caused_by" : {
    "type" : "parse_exception",
    "reason" : "malformed, expected settings to start with 'object', instead was [START_ARRAY]"
    "status" : 500