{
  "manageEntity": {
    "action": "Save",
    "entityId": "291617",
    "entityType": "Track",
    "nonce": "0xa4f2de314c733fd621515e5043a3aabe059934b29f0a80ca8c9797e4f83dcc5e",
    "signature": "0x20ec0d7a4328e792f80aea874991828be2c9ddbf81091f20932d667a7c4e6d9d20494a8259b3a6ceaea43a5b6130635632e0463d5d552150a2c8d16e5d2e89931b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}