{
"manageEntity": {
"action": "Save",
"entityId": "464895275",
"entityType": "Track",
"nonce": "0xba2e20959f0ae32b3e3caca6f43efba65b42780329aee63a57c58471b4f7e7e0",
"signature": "0x8a544aa70754660b721e29a6a629d3648cd23d9d0c4cf6c22237a2b210ccc62577ed8a52c2b60ef63dcdf4464f9e1fc469738423bd6a9176eeef6ba6b185ae611c",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}