{
  "manageEntity": {
    "action": "Save",
    "entityId": "293472",
    "entityType": "Track",
    "nonce": "0xda6176c7375179261a543cd9db6892c9db99cfacc49fca38fbc992e62a754494",
    "signature": "0x11690aa8479972cf2e0711e0f6709e5e5c60bed3e2efadcabaf51f03091c710f342ca880d25e8a86847abc2eb1d195fa0a0c7fad6689d71fddb7dedb70340cd41c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}