{
"manageEntity": {
"action": "Save",
"entityId": "455297439",
"entityType": "Track",
"nonce": "1792411333442919425",
"signature": "0x017be493ba9218322d96e0f29c84e8f007d9c2ab6f143bb23106a6644307a93f1ff0e175a804d558918e1d0b3ea74aba7129a9518caf14091e52cf6f0a2182c11c",
"signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
"userId": "105562689"
}
}