{
  "manageEntity": {
    "action": "Save",
    "entityId": "11441101",
    "entityType": "Track",
    "nonce": "0x2b23fa352beaf609c13ad4ccc7ca05e32e114d43885167ad0c300a51cb9635f0",
    "signature": "0xae47083c17701f3c00307a822f0c955995ac59310c30e975bdba63dfa6e31053448221aa87ff99161ea6f7c7f0ff52c46ff6b6772613cf66a5d2717a945871cc1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}