curl --location --request POST '/nimserver/msg/broadcastMsg.action' \ --header 'AppKey: {{AppKey}}' \ --header 'Nonce: {{Nonce}}' \ --header 'CurTime: {{CurTime}}' \ --header 'CheckSum: {{CheckSum}}' \ --header 'Content-Type: application/x-www-form-urlencoded' \ --data-urlencode 'body='
{}