{
  "manageEntity": {
    "action": "Save",
    "entityId": "848004240",
    "entityType": "Track",
    "nonce": "0xab2b9322d10a443da6b5153246fd43e262502f4ce2b405d66b03aeb595fb7cd1",
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    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}