{
  "manageEntity": {
    "action": "Save",
    "entityId": "191617904",
    "entityType": "Track",
    "nonce": "0x0a09ee2bcaf3dda7aa426897889af1246201bac494feed556442ff270bf5d741",
    "signature": "0x5c64ea11723556190a6b7e6b9abd48b8a7b99164e9f609fd50260e52e3b58dd63eae713c489da0807a15534631a4fc0f43070afe03e29893c25e06c90633f3201c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}