{
"manageEntity": {
"action": "Save",
"entityId": "1555296918",
"entityType": "Track",
"nonce": "0x75aab7e2863f8a2282d70e004360ccc5e31501b1242c1c9f3266d0b32898ac47",
"signature": "0x30826bd8c03f3fe844ac394026f9c3c0b0d816684dd2f2fa00f474fd73f18db26bb8d6856989da923318332e3e19bd17349fed5a5a13e32630d428ac7513180e1c",
"signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
"userId": "584616263"
}
}