{
  "manageEntity": {
    "action": "Save",
    "entityId": "951122095",
    "entityType": "Track",
    "nonce": "0xdd25b453b14437ed932a733ee08e51ac607e4d4c097da771f787db632ee6d059",
    "signature": "0xed0acbf90d654cbf30c3fb39dae9b41ec677ed43bf3e8fc81cf8390d5f24a14c539c7e1fa378b5cdc544a8a82b4b0ce53e984e3ddf4372a5f786e2b69d160c051c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}