{
  "manageEntity": {
    "action": "Save",
    "entityId": "1568625709",
    "entityType": "Track",
    "nonce": "0x79add9eeb9ac31875a226df28a14705690114aaf004d372f2dfb9ef9b7b120b1",
    "signature": "0x2398377675749327a8760e9c9d91c5fe9832964fa58df92aa0a99c2f25f7107871ac5b170649f1ddd8093c7e21bea1b8fb6c5a4d47b90bb09734fdc8ad4858d91b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}