{
  "manageEntity": {
    "action": "Save",
    "entityId": "886319636",
    "entityType": "Track",
    "nonce": "0xd598129c5ed9ad444f4026ce3c0968543be8dc8b5796d8350f96f01c5dd3033b",
    "signature": "0x693dd76cef36e3132f94206765cc88a08215ca72be4ccfc766a7168ea1aba23a3b5f04eb372840b9e3cee261015751e0f3fe844e6d80c2fd6457485492dd7f831c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}