{
"manageEntity": {
"action": "Save",
"entityId": "388681",
"entityType": "Track",
"nonce": "0xcc1185c13c15c8546a130099e9d5c75fa39c414d1c98690b4454cb05789e1e21",
"signature": "0xd56c2317b1e8db02189068ad194e8cd7fa52f1dc68468f9625a46a5615d0f932423de8495bb182a8cf0e00f6419d01799800d8a2c75694430b05140638d398e61b",
"signer": "0x766d742Cc35188990Dc38CaD8006DEcEe3fAFed5",
"userId": "353834"
}
}