{
  "manageEntity": {
    "action": "Save",
    "entityId": "54472",
    "entityType": "Track",
    "nonce": "0xc3c16327aa7749c9fdfdbb46c52d01a118196390871ebe46cee6a7115f1989f5",
    "signature": "0x1988f03f3a9790b3a1d66a4b47976ba0a964dc463cdea54e8e68de16fc6c979d40d68ef585c36ba9cda2bb90d78c40a63bd3508592fc946ee194a28e838173591b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}