{
  "manageEntity": {
    "action": "Save",
    "entityId": "541590182",
    "entityType": "Track",
    "nonce": "0xcd59aa11b50754da53de324a246cefc92b67c6d1bfb89e3ca27c3ed3c623f2e9",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}