{
  "manageEntity": {
    "action": "Save",
    "entityId": "1072464539",
    "entityType": "Track",
    "nonce": "0x1b944ef8ac1fafab0afeb6af42817ea3208d37a271db41f9cf8d6d76a2dcee8a",
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    "signer": "0xeFC9B78A20535768B9d5BCd2702b853bd5C0789c",
    "userId": "333246"
  }
}