{
  "manageEntity": {
    "action": "Save",
    "entityId": "1518529304",
    "entityType": "Track",
    "nonce": "0x94872a271dec991b99ede4f48def81dbfff7c55d68905ec26907779b3b180317",
    "signature": "0x609daa112e4d4f0443ecbe72c5633931e8b76db40b8eac53a71acb47a0cdd3a508cbfb0d7e76713944891e18d9aaf95a3b45b6389f72ecded05eb7311f5c9f8f1b",
    "signer": "0x38ECcB9EE00b4bf5809D1378a0E473126b01926A",
    "userId": "339278109"
  }
}