{
  "manageEntity": {
    "action": "Save",
    "entityId": "160322123",
    "entityType": "Track",
    "nonce": "0xd56bb41b1576f30ff3698c2132c6bad2d4b2cfb9bbd89de97e6bade260b4a506",
    "signature": "0x621f806f489d815c759942a9ca4445c91db0242d61112f419f1be58c84ec6a934cec9e5e0666765ea7619ea48ceeae725ad68153e3170785f58aa009e53b006d1c",
    "signer": "0x580b8ce3181CecdE24dda8DddDB6a57828990d63",
    "userId": "214104220"
  }
}