{
  "manageEntity": {
    "action": "Save",
    "entityId": "469641549",
    "entityType": "Track",
    "nonce": "0x0da6b0daf90ad7700eaa4f0b9851f72905e1221a5954f482b43967937061af34",
    "signature": "0xe1a605d371c361b5418e4c9f6302f9ec922609000c6c95a47182cfc984e81aa520c47a2e2d5eeef38ed79d1746a3385be8353ea5165737c0b6af605df5cd10151b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}