{
  "manageEntity": {
    "action": "Save",
    "entityId": "222267286",
    "entityType": "Track",
    "nonce": "0x1bd8d1cdc9f93d8f8601e7873efff023e84c9c0db5a2ec1bd7128542930adcec",
    "signature": "0x8f8303de6dc5147d13cda62230e1dbc462377096d0817168c9a4c127ac371b2736a1f88b2d65aba5a0715d8032153a5f635a7f70292a28381eb48db5491ed6241b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}