{
"manageEntity": {
"action": "Save",
"entityId": "2064704843",
"entityType": "Track",
"nonce": "1792297581322583882",
"signature": "0xc63f84062812caeccff15832f92484b0f2fa52215250e2a32fee4cad1114f05535f2b7d39b79c4ca61d46ffa0b1c4a3122035e922e6e5d08be42ba655655d13c1b",
"signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
"userId": "105562689"
}
}