{
  "manageEntity": {
    "action": "Save",
    "entityId": "1303675394",
    "entityType": "Track",
    "nonce": "0xba00790e35ed2d398499564eaf8d3b6c29b158bcaf0fe9d3b40ff1eee7594bfb",
    "signature": "0x9570abd8edd0ccc8573f226fb4c64afa9ba839e2097f783f1b4bee0a568fea5b199ee3cb8eb6b7f66588af8d8838ab01e7a9ca0a8f6684585aed45f315782f851b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}