{
  "manageEntity": {
    "action": "Save",
    "entityId": "76224535",
    "entityType": "Track",
    "nonce": "0x171a600328d1004dd19634d791c29aebf4a64d7a50380b57abe4eb9425b3e4dc",
    "signature": "0x2a20bdf960e8a420ef68f8fb8ef85245d4dd3df9f647daba5bd2bdbaba8e4cab6b1cc9d1268577e8ceb246c29a18e6d8c0fe31d77fda37f3cfbe06a8bf8490c11c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}