{
"manageEntity": {
"action": "Save",
"entityId": "564452",
"entityType": "Track",
"nonce": "1792290856459694077",
"signature": "0x4e38561f7347d7a3cd92840379ff837ee184791146fb308c5c41b59f598542be364104268a713e1e29b7673d82228ae549e73343a91fa75b6b6ec88a5dcd50571b",
"signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
"userId": "105562689"
}
}