{
  "manageEntity": {
    "action": "Save",
    "entityId": "1409123390",
    "entityType": "Track",
    "nonce": "0xa80bc65c1434df6162c644ffe5854e66fbd246a69616e6c23dc768784c9660d5",
    "signature": "0x37bb595551b3655a02d7223dae0429a80ddb647bb8256ecf36d873a10a8f7623053a487b8debf3515581d5818359008e105257091e8553e8b0a2c9477e00c07b1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}