{
  "manageEntity": {
    "action": "Save",
    "entityId": "1994899359",
    "entityType": "Track",
    "nonce": "0x74955d87ed1e43b43bd25d676a2eb707a7d8b1923a5aeb87eb730329b8c43983",
    "signature": "0xa6d4dbbbab077b65bd8f2b2cd93c0b992f317aea71a40bedb1f455a54526cd5871372f7127711285bd7728123358c178faccc6495d022df10a2daf2f51ce60031c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}