{
"manageEntity": {
"action": "Save",
"entityId": "665737350",
"entityType": "Track",
"nonce": "0x908dd7f693d2265535aa7fc4f8f17c4659c8ef90babfda624be6f7d114c64879",
"signature": "0x1291898036c66487084ed8f800e4abcfce0e442f0c4bdf925346b3025cfb8cee1fae0e32450ebc468a1e1383f93b733eddd9de81e9b17724c5bdef38787c9ed81b",
"signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
"userId": "632918751"
}
}