{
  "manageEntity": {
    "action": "Save",
    "entityId": "2088943291",
    "entityType": "Track",
    "nonce": "0x1e30c8fe7794243bfa5fb43a4290a03bcca81e60089ad09e58550e794aea090d",
    "signature": "0xf68457a20337406aa43b6b040485662843e05b4551c6da20d2ed18643efc124b03aeccb3c295cb9697d7e56350941427b74cea608dc5bdf38167f7cdb7107c621b",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}