{
  "manageEntity": {
    "action": "Save",
    "entityId": "1596909729",
    "entityType": "Track",
    "nonce": "0xe9d9a01cf910e100d88909af1ea9fe4d1d1f102118a823964a96b4a383afa5ad",
    "signature": "0xbf27339e258e813042bdb3d36b174fe490e04183a89ac1d1c0a61275607a0bd270bc944eb117feb808fd16372702a8e1e0bb74147fac91fbed116c9cdc0657301b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}