{
  "manageEntity": {
    "action": "Save",
    "entityId": "281929",
    "entityType": "Track",
    "nonce": "0x1eea4271830ded4f857e065eef67625aa67c93668b3998545536a1ae9b50705f",
    "signature": "0x9468db37b7d8f01e5a519d2a2a66320f64e98148843186e450cbbbff44b42fa0230dec853bd4820dc3109cb9a5506ec4ff9a8a6e0a1d03ad06c3e01b7bdef0f71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}