{
  "manageEntity": {
    "action": "Save",
    "entityId": "1300014459",
    "entityType": "Track",
    "nonce": "0xd09fca3eda405cf2a00387decd6107aec3f83b05d500776687e0d043de7dd2b6",
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    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}