{
  "manageEntity": {
    "action": "Save",
    "entityId": "176901238",
    "entityType": "Track",
    "nonce": "0xe8cf40bf964599118c6a33d023c63b9bf85d1359637989ea197e85ca3bb9f01c",
    "signature": "0xdbc35c6641143c81f80082d5ff6c856f0c0e1709e012db9cf78e2391ba815231348f8cf4e627d3e5ac00c131f1ab8d377b52e479678ef4e1b5769377dd246a331c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}