{
  "manageEntity": {
    "action": "Save",
    "entityId": "240354",
    "entityType": "Track",
    "nonce": "0xfaf93f1953aa314dfe133e6957e1c5b6e4d46c6c70798add2ddfa0b03778899a",
    "signature": "0xa5946113660fc0d95a18ff839e7dd143eb7c6948f2b8a2a71131f10ad2c7989a7735c14a0f30f936219e96b87b64072b80fc36eda02d4a8f034a03742ded486e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}