{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416603629",
    "entityType": "Track",
    "nonce": "0xf261ddb4ac079e0cd55db811087d6c15558f2c7853ed1f1b792c566948b5fb0d",
    "signature": "0x6e78a94f25b6f4a4ff7d992a46d44095e561f45d2726f9387d71f36f3317d72c134adf29ec388bfcda3487354a41b877bfe05cba80fe1d81f0b7852af1476bdc1c",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}