{
  "manageEntity": {
    "action": "Save",
    "entityId": "1153439626",
    "entityType": "Track",
    "nonce": "0x6575a4e1c074c9358afedf30bd3693c053b35449ce7120c13a638f92f7333530",
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    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}