{
  "manageEntity": {
    "action": "Save",
    "entityId": "429255878",
    "entityType": "Track",
    "nonce": "0xb66858fb306e8f47f2d166002600893fc852f2f9d12671ed13108d081b1834f6",
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    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}