{
  "manageEntity": {
    "action": "Save",
    "entityId": "1646463330",
    "entityType": "Track",
    "nonce": "0xb734aed1cfa998845de281ea32e782200a2716af293e27ca3b66523557e51bdb",
    "signature": "0x0236d411341387c940e00b8fbf4303222ee01dcccb719a8eeeb327edd5281388410a2a9a3a4be636de9e404b82fcd971d750790aed4362ad0088ae600d366bf01b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}