{
  "manageEntity": {
    "action": "Save",
    "entityId": "1137791725",
    "entityType": "Track",
    "nonce": "0xb6545a4957310686e166a57fd81fdeed889e57c3bab195d342eb2340a6db5e92",
    "signature": "0x927bb44164338735236c7b910083d56dba202d6ad4268ead2b483f0e3b70959516d04d7e007ca6ad5ca301e3897f1ba76769200b95d06187201c9c8fd8ff1e781c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}