{
  "manageEntity": {
    "action": "Save",
    "entityId": "1244874991",
    "entityType": "Track",
    "nonce": "0x876c7c18ac271480df7cf03b7666a0dc11153f8354313d627ab7b2d72fc014e0",
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    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}