{
  "manageEntity": {
    "action": "Save",
    "entityId": "1398850732",
    "entityType": "Track",
    "nonce": "0x8282a2431b3b32d7aa554464764c4740b55071016090d90fce79f8ec326cda18",
    "signature": "0xa1de63cd0d645c262af0f8ca0e2dbeaafa5771dd5ea5fb83367a9bdc5a28a565412c9949d36da3ee68d6e0a0822f2d4d4153dbf047eebaef77c26bd4321245721c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}