{
"manageEntity": {
"action": "Save",
"entityId": "1612224329",
"entityType": "Track",
"nonce": "0x34cab5f4c5acd301557e46b99f2c2445ab770032e97a3f7da2d7d3525ae6212b",
"signature": "0x7ab2289fd9d67942670a3daa5acd054d1611e7824c2c237e3c74182f6f7b03352624af8891ec778148602df1168c25fb561655bb358583e9509d0e8f0754f6741c",
"signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
"userId": "162770660"
}
}