{
"manageEntity": {
"action": "Save",
"entityId": "642923124",
"entityType": "Track",
"nonce": "0x0e471c0dccf36727ccdc76e86dd74e6fd4030ce429daec3055f783fe6d29c5a5",
"signature": "0x446da80746c60412c13160413b63b7f5bdffb8948111683528b1578e88ddaa4a69838e1c9b6ce39b08273a41b91e4d5a524aa8f51f693cb9eb403a9212cd30081c",
"signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
"userId": "714646433"
}
}