{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045265585",
    "entityType": "Track",
    "nonce": "0x9972878f29a8debdec224998389d682e1a6ef96b1952c5510c9ebfa93201d443",
    "signature": "0xf0170adad6bf21c56dcad333b9d67d87e615a17e00ed3d2607afb7136fba7cad4348d31a2c1a28b62cf7545db22f12a511f9cef247ce5cc6e2169e4bf1cf69641c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}