{
  "manageEntity": {
    "action": "Save",
    "entityId": "1339139491",
    "entityType": "Track",
    "nonce": "0x69761fd9c01504b916bed109180b2f7ca6fa5024bc87861e314045759df5e6db",
    "signature": "0x5500812742e23bb73c20b6740df201084fb3d6c010e648de6d4c1e8f5ef1dbfc450244ddf2196bfce91c1290040ba13a4b7fddf040562c7ec98361e07cda97ec1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}