Get a payload for further token receipt
/v2/tonconnect/payload
curl -L \ --url 'https://ton-open-api.nownodes.io/v2/tonconnect/payload'
{ "payload": "84jHVNLQmZsAAAAAZB0Zryi2wqVJI-KaKNXOvCijEi46YyYzkaSHyJrMPBMOkVZa" }