{
  "manageEntity": {
    "action": "Save",
    "entityId": "381793",
    "entityType": "Track",
    "nonce": "0x2ce3c9ac326893283daeae69f25d38dbd1b4d9f44e78007077871208b99d8937",
    "signature": "0x62774174db2057b1272105c308f54d699428aa2bde29de3e73fcdd3826ed38262fc71d237a1c84d4a985168998bb9afda6a2fd0744dde3538a073e9956bd18ee1c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}