{
  "manageEntity": {
    "action": "Save",
    "entityId": "173946041",
    "entityType": "Track",
    "nonce": "1792440172943847870",
    "signature": "0x6c107ba0bd19c4d39cb95b9eb0429cac63452bd1c02a36906093204448aa9cd0487e68a0781987998fb4f629ecba39b0170619f337ac78be97fb58ab0619e34f1b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}