{
"manageEntity": {
"action": "Save",
"entityId": "345115064",
"entityType": "Track",
"nonce": "0x5b5c9d4df9881aa07929ad884826257548d59b41b8d3f4e552528466cd980a2b",
"signature": "0xe76e93c60b1076c299cf44b7873d04cf5e6f48e468dabc15fcc44beb5b52ea12487fadac9ded90126417394877cf856815c9ddf896d74e50e33186ff751060961c",
"signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
"userId": "475275462"
}
}