{
  "manageEntity": {
    "action": "Save",
    "entityId": "605588",
    "entityType": "Track",
    "nonce": "0x31a1bcb143fa7bbd2eacfee71cc58e7a739832ca9f0bbb84d8831b33a7465d0e",
    "signature": "0xdb45bee4615202f97c2fe58bd7324be9160af1078547461f4ce31d2f72477c9463c4b8606aba7f9bd0b5da9680eb9b794bbb791f68942c39bc21d0d1b27015ce1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}