{
  "manageEntity": {
    "action": "Save",
    "entityId": "655753050",
    "entityType": "Track",
    "nonce": "0x81f499f48f35ef79ae1aedfb8a9a8075d1c83d0b556e2e0b6c15dab4df614f3e",
    "signature": "0x647308b186c3c88ebf6ec5f340cd62e0c67cf150801b7586c2ab817161f39dc33333b2934681117cb375ba62a38f5556d1535af68563d5572a1a4648575a4be81b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}