{
"manageEntity": {
"action": "Save",
"entityId": "1773772001",
"entityType": "Track",
"nonce": "0x65b82ec4f752a7f54a0a9bc4189f9af06d7ecba4dc973131b910043c6a772093",
"signature": "0x18b555ec4219b541bc95333318eba7f14e828902cecf87940626b8273f7c11dc52241bc03b8f56646727eec84540c37b6b41226375952410df0053258bd4d0bd1b",
"signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
"userId": "325172820"
}
}