{
  "manageEntity": {
    "action": "Save",
    "entityId": "1331175459",
    "entityType": "Track",
    "nonce": "0x562bb75708295c3e09746b2296d37c37b57b6b79bdb44b80da036abefcbf2c50",
    "signature": "0xdd989fc34376646fa67b78ab16e344b257b9d2f0ff09271f66416cac89e41c945e8f7fb913295eca32c2a45265f07d0bcc1ba809f73cd825716add6306cd392d1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}