{
  "manageEntity": {
    "action": "Save",
    "entityId": "167308274",
    "entityType": "Track",
    "nonce": "0x608b7c4fb4ed6ba4221f9f87df737f0d514f71ae0d856603d0eb07a73162f073",
    "signature": "0x0ecfa0388eaae92b1dd93c11f586f6b0872fcd4b55635e52dbf15f037447e54b16bd1d71d634954d7e5fb2dba3490bf8f04ae07581ddbb15af7799b0a1df822c1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}