{
  "manageEntity": {
    "action": "Save",
    "entityId": "1912080440",
    "entityType": "Track",
    "nonce": "0x73cd499e581b74c38eeadf2f0a0aab7f1acf2c348c13ded6016b28ccb194d2d9",
    "signature": "0xe97b283bb00ee7cc212e494f8805e51c165405a15fc3435333d563c7c912a6ea6d7469cfa63db933018deec9a9065694b6ad72574f67ba993a8faf8ab9180f5e1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}