{
  "manageEntity": {
    "action": "Save",
    "entityId": "302332304",
    "entityType": "Track",
    "nonce": "0x5ae7984cc6892e5d4f6d571ac642ed60bde3f1a764bbea0d0356d18798ba4cb6",
    "signature": "0x89d9a09004ce0cab13033047cc75f2e4efb6f7af107acaea0883a7ef92460fa62d46652adf7ec8dc1767a5a14dd55e229c9b10eedb3fadb60ba2a1e6c42510611c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}