What is JSON Payload?
Payload is the essential information in a data block that you send to or receive from the server when making API requests. The Payload can be sent or received in a variety of formats, including JSON. In programming, the payload is used in the context of a message protocol to distinguish between ancillary and actual data in a request. For example, request headers are required by the server to correctly interpret and process the request from a client, but they are not the payload of the request. JSON syntax elements are also not a payload.