{
  "manageEntity": {
    "action": "Save",
    "entityId": "597675358",
    "entityType": "Track",
    "nonce": "0x692acdc6a88f516b8cbf5dc3d17def21f2d44e8f6690e037bec5856263c926da",
    "signature": "0xfa03152834194c9b862b1df51085c792b1931b7bd2a6cf327aac651a202f650715ccd74eacf79d45360c97e6f5cc7241f3569b95b97a3c3910e6495d7544cb0c1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}