{
  "manageEntity": {
    "action": "Save",
    "entityId": "1125408993",
    "entityType": "Track",
    "nonce": "0x25e55f0315dc3c33cccca889199c2c810f25f92d31041b1d62e2b311e20a9b57",
    "signature": "0xf61958dc906e98fad67f91db4bc19b920c515c2f449d93ee3a4114aac495aee55cf7a74c9fd893217e56cdf2d419e94010f84ea469aadfe9f937f63bb5ca47261c",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}