{
  "manageEntity": {
    "action": "Save",
    "entityId": "518757",
    "entityType": "Track",
    "nonce": "0xc8decc65017e62c9a68483be0c98762b38c30c8f494de679307276bc8d7cf1b0",
    "signature": "0x0629f8a16546241dbf40a84851ac8ef5e06ff9996950d390fe4bcc3a9d1f1b7f279fec5d8d162e32b0683ef543316c28c227a64cd34ac1e5070ffdadec231f561b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}