{
  "manageEntity": {
    "action": "Save",
    "entityId": "370097",
    "entityType": "Track",
    "nonce": "0x35dfc31fe3fb4372383735eef9eb4147bc78a72636d44871182a639d75878d6f",
    "signature": "0xbfe4bb0a418440f0d61676e05488383dcf91a7f1c5b445b49a7e3acaeb5e69321dc36971c07697c55b462fbc48d246afe902d7c0a8a8c7da91133da0c56593e11c",
    "signer": "0xc5C7EF7DBB0e045Ce4F4482e399ACDFDd99fcDa4",
    "userId": "221479982"
  }
}