{
  "manageEntity": {
    "action": "Save",
    "entityId": "712036884",
    "entityType": "Track",
    "nonce": "0x02166d066fdec1e0a79bf0bc44bbf6ed79b70248e2ef2a612308617f382f95db",
    "signature": "0x842dc0a745ec922477c2752a9824ed554be0083b1e1bf6a374cce4808a6092551a70632d37201472acd815f38c2c9cff9b2984b4a6179fda3d626010669d57c01c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}