{
  "manageEntity": {
    "action": "Save",
    "entityId": "647284594",
    "entityType": "Track",
    "nonce": "0x563a24b83b4868ff00697219c1aa6621ffadfec654294eeb2646fd7efc135f26",
    "signature": "0x07c7a30424377767288a98ff9c2dc6a30578f29009141b92b98e9ed75497bc794abc1ad07fc86d81add07740935c6a1e5864773dcce3e86e391d975f8c4a52f11b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}