{
  "manageEntity": {
    "action": "Save",
    "entityId": "1454837842",
    "entityType": "Track",
    "nonce": "0xd2ec1ded2c1f56aac6a3fa1f508ee26cedab27451ec3032a3519cd1ab6dd5b9e",
    "signature": "0xf49ef1bd7e986b38dd19274570909189325d7cf65066fd9072a1d3bc6d006ec411370c69f7d5709baa41601b6ed0647d95f370fca95831efe49f253ffc5803681c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}