{
  "manageEntity": {
    "action": "Save",
    "entityId": "1393436239",
    "entityType": "Track",
    "nonce": "0xf79aa8d8c7040bad0be17286332a307ace32baa960e7bd42fa65e5628f1d92b5",
    "signature": "0xd5725f094b6a610fb637217e06148fd71c11f88e2b3ddfaa58fad4cb2ba81e0722e0a397332a9a39567c189cee0d5ba82857af8b49017d8dbabbe08fd97bf00f1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}