{
  "manageEntity": {
    "action": "Save",
    "entityId": "1465190541",
    "entityType": "Track",
    "nonce": "0xaae50eba628672d04c38a1836d8183e58a8b5311e6d77365ceca46baca3468b6",
    "signature": "0xd472dbeea3b9e8d6400cccd2d03d254cd5207749b76f7dfe850651f3e0ef168a06920270ae0d880593e583e7c318769f370d8c554616d81f5b2d10c4fc5feb711b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}