{
  "manageEntity": {
    "action": "Save",
    "entityId": "1331133346",
    "entityType": "Track",
    "nonce": "0x0b3c3c8aac0c26323b084f4c8fac24c90d4b2536bd43e8011f9ac3ad21402241",
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    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}