{
"manageEntity": {
"action": "Save",
"entityId": "1791507368",
"entityType": "Track",
"nonce": "1788953581096872386",
"signature": "0x437fc7a77e607f64ec620a68791346357a00c5be3e687727a2606c22db6ec8082aecd34fb81d67c1f6d622862e8b58234f4b9c093370d7d7787678660c16e5f21b",
"signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
"userId": "568518925"
}
}