{
  "manageEntity": {
    "action": "Save",
    "entityId": "314554576",
    "entityType": "Track",
    "nonce": "0xfa3256df893776cd741b9d93f78c5777a7d79ebfd374e943c20b7513d808fc62",
    "signature": "0xcf090c9db389556be45bc6e5a87047c5ccc4bef0765e34bb347e9f070c42185f2ea428fac2ba53079d7d06cb29e12142017bde0638dbf85ee380181c29bc94e11b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}