{
  "manageEntity": {
    "action": "Save",
    "entityId": "655057198",
    "entityType": "Track",
    "nonce": "0x03bf0e24c45d19d22d7f227c5ab62629e413d0a41cc3511683bd902b69ea3d63",
    "signature": "0x40b4b5be1aef5e551a187a09e8c63217e0ebe3585e63612274edf4a86c95ad601aec87d2b4fcdccb683fbf6f3fdc34b147b8e0dfe26689402701ad30411fd6671b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}