{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401476747",
    "entityType": "Track",
    "nonce": "0xda8c063e3eb79151740adc33611aceb9b4dafd72a6ddfcc367e26eed1e60274e",
    "signature": "0x933b0341bf6075b87dbee825a41e5f2540f671366bea2f0505e0e394b199c0d773083d6ab489cf92047da82569e75264cc976bc07b413d74dd7e9c4b2fef33401b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}