{
  "manageEntity": {
    "action": "Save",
    "entityId": "320823",
    "entityType": "Track",
    "nonce": "0x460a6c33cb81cb96c092a5c5c9c449c393f2dabe2f8d03af735b5a114d95d7e9",
    "signature": "0x7e32253f0a0e27ee272e23542ca752b9b4c7a2f445cd8e86e97d2754bb6afa624d8d0167ed2046a75bb14d03d1b9350a3bbd2acffac59b8c6c937561a5b62ba21c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}