{
  "manageEntity": {
    "action": "Save",
    "entityId": "262351496",
    "entityType": "Track",
    "nonce": "0x497ecaeec164a2cbd44d3989a96b09226d14c145204f321a2b0da5bbda28318a",
    "signature": "0xf8f8e5ce4984cef6cd19d40f9a76ced7d121641bed7201056bcfd1f2702a4d7e6e4504c3e5f62e3ca1db5dd35f81a056cfc598da8e0ab372831dd0f6a186a58c1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}