{
  "manageEntity": {
    "action": "Save",
    "entityId": "831409517",
    "entityType": "Track",
    "nonce": "0x80a2438f0a93fb733d284af0e11167b4b4d3605f376d696365402ca7df398b6b",
    "signature": "0xad7053b03637ea1b70ea476aba8ed50cc1938d0b7a397d8f75863d195313182d0dea29ee37655d58f524299593e4f53cb06f8ba12dd1f42b58b4d4a184b033111b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}