{
"manageEntity": {
"action": "Save",
"entityId": "1784098784",
"entityType": "Track",
"nonce": "0x17e0292dc1f3dbc5a2f62ce5ee08e0a68551224c09c899b77341021244c31c8b",
"signature": "0xa3b8286129499189373d19444805959b6c13ded4980ab1e8f9bd2005f5ff2cfc36f00b468ad3577bb923870e8fa721a3685c95a32eebf6ddc62eb53d36745a3a1b",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}