{
  "manageEntity": {
    "action": "Save",
    "entityId": "1278884483",
    "entityType": "Track",
    "nonce": "0xb75d21a794f2f312ed3620b31733d78ae172a51a31d6f7d147966b7f4a57b7ab",
    "signature": "0xd8a9be318c49ee54a3876b1bfc70f49e37bd98c93f68d4f4f5cb502148c14d9856519114b765558af2bd702c22850a895e5bf79c89b9de96013008da919c75671b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}