{
  "manageEntity": {
    "action": "Save",
    "entityId": "963077490",
    "entityType": "Track",
    "nonce": "0x4b1b996613de43d9c6a2369e6ebdcd03ad839bbd940f9a1cf5a24ae90321a2f1",
    "signature": "0xa06441f7a2b28d9c4408ad7eae38f623b3b77e010b3a8e80def79f111acbe8727707eb8659276a9ebd24e6c324a6ecee93216796166cdca5353ebaa389bacadc1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}