{
  "manageEntity": {
    "action": "Save",
    "entityId": "1683790275",
    "entityType": "Track",
    "nonce": "0xb9a13aa14d8eeb6f888fe66409a9083c2235a60597be08b0408f4649c52af5ea",
    "signature": "0x461e467fb74c603ede30bfe7487d08c6e4dc95d1689e59468dd42073728cb6d620891bfca7512a61b8e76630681792815fb8feba4cb464340c0b6f97e9dc8a561b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}