{
  "manageEntity": {
    "action": "Save",
    "entityId": "247548",
    "entityType": "Track",
    "nonce": "0xe0f9ed399eba29459485fcf4baab590717f3b63aa22d70284b3a52b30322ee6e",
    "signature": "0xd23f8e147f4a4fd0b963b676716fe382ee8c63fca6797e63a585b7bf02074edc05adf830c547957d84242ce132c31c36e7fe423b22a6ffd430e8a759767240e41c",
    "signer": "0x354f479338B7F1593E5Ed2Bdb91a09c4bD12996C",
    "userId": "381478870"
  }
}