{
  "manageEntity": {
    "action": "Save",
    "entityId": "576577",
    "entityType": "Track",
    "nonce": "0x812cbe97fc96e4138b3171ca106e9aaa381002079dfc884213001109b5b6f322",
    "signature": "0x8aade7eb447fac0e49fd696d451dcd089b06fb3bafa3882e7f75f4955da1614536643abce4802ce528908e7e31fae9ad566a23d2f95861bdd861c5ab1938507b1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}