{
  "manageEntity": {
    "action": "Save",
    "entityId": "1705355082",
    "entityType": "Track",
    "nonce": "1785859856860151859",
    "signature": "0x1a5aa333d59359bcac4ee1393e4c3ba776974cd657f7d5f7be86097c14f86b2d32bafa2ee227637fc004131acb4ad4a565dcb647c827bd20c7516677e5ffe1af1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}