{
  "manageEntity": {
    "action": "Save",
    "entityId": "1055778",
    "entityType": "Track",
    "nonce": "0xd2b156e4be5822bca96bf3a962c18b9760a4f0d2381eabedd11d1fc6e6c15096",
    "signature": "0xa309934c023541fb7c95a8631c53b1c40d6d3d950815c4e383932a97545579932b4c0d3479d6010e9b5f09398e78f3a1ebb84b0d17d7c3c21333c7bb4ea797f51b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}