{
  "manageEntity": {
    "action": "Save",
    "entityId": "1378095585",
    "entityType": "Track",
    "nonce": "0x429828ca1122516565faae408f8a0ae9283bef7f31ac5c3c20e45f53d1f3cc28",
    "signature": "0xedcbfc005613199b7d70e3e0a2b28860c8c0eec34c50d87fa1d88f8b8b9c20075a66400cf9aaeee3db734aacc050a1b44a9e89529332bde82ba5424be33bde861c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}