{
  "manageEntity": {
    "action": "Save",
    "entityId": "981701176",
    "entityType": "Track",
    "nonce": "0x6894c61eb755892d1be058ae2ee9bd53a360bc76f4e77b15b98eac5fd5913c81",
    "signature": "0xc5d0a68ec125b5dccaf9f752855f2f5784ee93a8ec74466239b86ab6ee0212c148a274874f92eed79db761c1473456f1bc739338695cc2ab296453358e51b35d1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}