{
  "manageEntity": {
    "action": "Save",
    "entityId": "86463619",
    "entityType": "Track",
    "nonce": "0x9159322767e0ba8aceef9ff11e70f884ed4931f4808180f1f6a99f9d5f97e5f4",
    "signature": "0x994f23d3b1bec9f86803994a218f8bac8f3cbedcef7f11d404c0e347b6b7286f02f9eb14fb7af41a8c901edf0aa3665d0264fbead75d50f88956237b821fa6071b",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}