{
  "manageEntity": {
    "action": "Save",
    "entityId": "1823395648",
    "entityType": "Track",
    "nonce": "0x3e33798c6a6bd8d8da58510dc85ceeac151291dcf361b84af533d5cd3c6138b3",
    "signature": "0x74d2961af271ed01b7e49c4f57f57980065149a575f4ae0e2daaae31ef544ebc26d52fa313bfb6fb8852683c97ce3ece948d1debf8a48973480cee8aa94a18e21b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}