{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913883292",
    "entityType": "Track",
    "nonce": "0xa04d24230c68c327185faa42b75dad51ef6bbd7a8138442a5f2a4ec12f0878eb",
    "signature": "0xf8a9b80dafa864199dce92a490933fc8aea3c7afa2d686927d8ef1a8df12f1cf3b4e591f001d71ed10d88e8516aab934b7472c77c6034bd7cbf0af23c22f2e7d1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}