{
  "manageEntity": {
    "action": "Save",
    "entityId": "42612127",
    "entityType": "Track",
    "nonce": "0x2fea5913471b89f9a5d738d0db82213e03c1674cf0e071f65c07eb36ccff328a",
    "signature": "0x9ab263d01e3f3aec7c97e17875af979332cedfbb8d3cf174156f035f6291695a761da0484cb65a4c01ae3e1807ecac8e5a23ba7e7d804d47631683bc776f7b5d1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}