DefaultMaxJSONRequestSize is set as 7 kilobytes what usually should be enough.

KB = 1024 bytes.

MinJSONRequestSize - non-empty json can't be less then 2 bytes, e.g.

DefaultJsonWithAuthRequired is a request verification that requires authentication and expects JSON content with default min = MinJSONRequestSize and max = DefaultMaxJSONRequestSize for content length.

DefaultJsonWithNoAuthRequired is a request verification that does not require authentication and expects JSON content with default min = MinJSONRequestSize and max = DefaultMaxJSONRequestSize for content length.

NoContentAuthRequired is a request verification that requires authentication and expects no content.

RequestOptions - options for request verification.