{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458771321",
    "entityType": "Track",
    "nonce": "0xa278c9c140ec62fb93a173860dc4e16d72996e306f59464d28fc80d821d56951",
    "signature": "0x0fd88feafb53eda1ee6508af45d916f9918a52d7ce846700dc264d7fe4fe773147f92a21cf10f65e970d008ed513d5c40fd485267db540345e623146314fd53c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}