{
"manageEntity": {
"action": "Save",
"entityId": "618369589",
"entityType": "Track",
"nonce": "1787746188895357695",
"signature": "0xbfcf6d32a01049aa74c4ccc6859507a493a57b266f899fbcc9f37cfc019904210bc8bfd485ee8948a87ec066875f481a293cd9f1a0a26829f6213fe2eaed713b1c",
"signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
"userId": "105562689"
}
}