{
"manageEntity": {
"action": "Save",
"entityId": "1648032050",
"entityType": "Track",
"nonce": "1792588115524064431",
"signature": "0xb1da37497ac158b704756e4c426baa67f0a1b690cc75a0630fccffc3ce1bd38f7aca94d2b5d89a4039ac577c8ec7df35ecfe61324efcb3ad7dbdb34c3ddf07021b",
"signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
"userId": "105562689"
}
}