{
  "manageEntity": {
    "action": "Save",
    "entityId": "1516081169",
    "entityType": "Track",
    "nonce": "1786717529727908834",
    "signature": "0x5c0ac1e43bf8a23fe501b42542d5d19777c003aad9ea962ed305c0dca52802d452a5a9967defae5b1a7c2bc64e897118ee84e35a2f2fba471d6b5781572a795b1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}