{
  "manageEntity": {
    "action": "Save",
    "entityId": "1270934587",
    "entityType": "Track",
    "nonce": "0x2b22e582f3a46b84c3d5a33d63a6b793cc168dfcc3b9599dd1aa48e72395f5bf",
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    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}