{
"manageEntity": {
"action": "Save",
"entityId": "1781737336",
"entityType": "Track",
"nonce": "1793356741945255930",
"signature": "0x800040c6b35165124d252338b79d5bdd0d8a910d90cb5e20195e15aa880ab2035503105f84754937313a83b6427a0a787e995e18e91056af58929e39325bfc851b",
"signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
"userId": "105562689"
}
}