{
  "manageEntity": {
    "action": "Save",
    "entityId": "1339816935",
    "entityType": "Track",
    "nonce": "1785408592472254430",
    "signature": "0x1b6fd61d2f7ebe2f1c22f9acc65d30506c6dc9e5ce83bbf7440f8501c498e33a20209f57c891c3edb280b5cc4a6e89e56e185c94df5a5a8c35f1fe1d2e71efe11b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}