{
  "manageEntity": {
    "action": "Save",
    "entityId": "976089",
    "entityType": "Track",
    "nonce": "0xe8fc408b819c950274b6a2f07a9b6a54b27d9ec2f41aeea0e3f80996ec97cc65",
    "signature": "0x95160f2c8eb24d1cd969f9aa70a8b39d655deb60edc51328e1c23ced05916af712dbac3237bd0cbc054d895127ff2124192f97493ba2fa3694386e5ca938f7f61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}