{
  "manageEntity": {
    "action": "Save",
    "entityId": "572872595",
    "entityType": "Track",
    "nonce": "0x2426084381fffd4059c5445f9d76466c2df98c9ec26712f8647cd3275f826474",
    "signature": "0xfe7cfecd61c315783ab14069e5bb2ed634f4a18a77872561c3b758da4145532b772a7e15ead92d25d85837221901d58b470d03043d5d8899be03973e87aa2d971b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}