{
  "manageEntity": {
    "action": "Save",
    "entityId": "865238801",
    "entityType": "Track",
    "nonce": "0x3017ee3a9cd57afd94d06d40683a37789a4a396019672e976e38aea9dac6a92a",
    "signature": "0x9acee13c69763af5bbe463589a85a815c074b029ecac022895ee50871e7597d12e9150d4fa984ce3fe7d74a88a505ec6485fab39547f6d1ebdc37d1bbc5b95651b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}