{
  "manageEntity": {
    "action": "Save",
    "entityId": "1306964621",
    "entityType": "Track",
    "nonce": "0x3842be46f2778c922d44e6119763253b6333058161551628f2c7a43b54c04a46",
    "signature": "0x73ff2154fd72836962f77d98f43c05e3dc698d12a9297aed6a542f3928d4440855e06b294c44802b8ec241a1d429234452e241ceae0b291a08d06995dbc311e31c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}