{
  "manageEntity": {
    "action": "Save",
    "entityId": "731331244",
    "entityType": "Track",
    "nonce": "1786311293490134350",
    "signature": "0x20fb498346d7d5184105308fcd14f6ce9a49ebeef8789ca3c28b66962470a08d2db4a17dbaa70c6b6413b0e6a9f343269ca7761809ee6368cfc7133123fdedde1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}