{
  "manageEntity": {
    "action": "Save",
    "entityId": "185596506",
    "entityType": "Track",
    "nonce": "0xc461e080415c401a1e765798e15302d38331644bec2626424c951630a8c78476",
    "signature": "0x22c7154c360aa196372fea3c3dc1eb076ec4507fda1bb8c9ea9c08126e89ad67718724761858e7013fa496c72526fc6e60b43a39ac831b8fad0147232340010d1b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}