{
  "manageEntity": {
    "action": "Save",
    "entityId": "817164718",
    "entityType": "Track",
    "nonce": "0x0ee0d3b805b8f465833b50a08a48733ea203f55b7971af11c7ba0638d1dee10a",
    "signature": "0x67bc0f65b063bf1e1e1456bc72124917624ffa18a7fa46cd4060a43efb32efd9088319bfd08b02f443276389148772c8d45fe078271882951461c0a0a94123871b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}