{
  "manageEntity": {
    "action": "Save",
    "entityId": "1479114264",
    "entityType": "Track",
    "nonce": "0x886191f1608f81807d8b7c18ebcfc99740c3321519ffafd50f73a1ac27c515a7",
    "signature": "0xb4db9815c960d1eb173b7e4d54080e80a20d562506cfef04e9f4a3c55530f14e3e04360563e6de22872ef557a4ecd71be5d996fd91e38a47b454417ea7fdd7bf1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}