{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844565730",
    "entityType": "Track",
    "nonce": "0x29da70769cbab1a1b43d6fa730550e04112be5537287cbdf91badef3dd628be1",
    "signature": "0xce47b7b7a40b4b530ab23277462a162c46f46594bf84935e001e886f869231da10c2008445aa0b12a8eff005f85221f1573c0da5b78508eb40647be9d21e897e1b",
    "signer": "0x9436FA87F6c8C3aa9e0F0fc7960566dEeB9e23d4",
    "userId": "220347726"
  }
}