{
"manageEntity": {
"action": "Save",
"entityId": "497238648",
"entityType": "Track",
"nonce": "0x826cf3bf0b6b1a8561b95e3a29a1d85ce640a43601aed4dd1718ef047431b701",
"signature": "0xed2e0505426d5fa7a88f3774478987c16a51a6de4ace711da9352e662ac80baa51d901defd7bcd6b496f50590b7825042dbd083befd80ace18e8ddb7b9ff61d51b",
"signer": "0xbf1512a4755AA9909ec2b9b1E386424E0E7b6c72",
"userId": "868171077"
}
}