{
  "manageEntity": {
    "action": "Save",
    "entityId": "172684099",
    "entityType": "Track",
    "nonce": "0x2da55a1656ff8cbc1d3ba81c4bba5760baa06b0a3152b6a1069a4a2861567f4e",
    "signature": "0xfb49cb8e1aa6595722681859d7524843b884ddab1e94066c9351b0f3559e14b50fd936d6ada002069d24d4fdf8bbd2785f576b6e559dcb7b2f355ff3f7f05b5a1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}