{
"manageEntity": {
"action": "Save",
"entityId": "1523534388",
"entityType": "Track",
"nonce": "1792800098792204771",
"signature": "0x37a237dfd0558949b8ecf5cfe3887b9b055401322267c5761362c047757e7b584081a5316ca4cb3d40b5a5e9508a497fba6a79946250cc6a8ded0a0d2f7d14ca1c",
"signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
"userId": "105562689"
}
}