iClient error: 'Payload must be a valid JSON format'

While creating or editing an OAuth 2.0 iClient form on HTTP connection, on selecting the Use JWT check box, the Payload field is available for you to provide the JSON as show in the following image. The iat claim is auto generated by the JWT module. 

Note: During the time of export, you can have the quotes (“”) in a non string value as the product backend logic supports the export claim in string.

Example - Payload JSON

{
"iss":"sojern-finops-data@appspot.gserviceaccount.com",
"scope":"",
"aud":"https://oauth2.googleapis.com/token",
"exp":"add (timestamp 'X' 'UTC') 2700"
}