{
  "manageEntity": {
    "action": "Save",
    "entityId": "48812353",
    "entityType": "Track",
    "nonce": "0x6f201652c97affb96b30f6507584e69017418a682f8b23611cd69c6d235971b1",
    "signature": "0x893ff061963d8fe10b39cb5bac1efb6e66538b7886ffcbcf0bdcd8a188b7ebd03db077393cb31c6b89967f69c27e7fd857142eca255830da03e34d714aa18e671c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}