{
  "manageEntity": {
    "action": "Save",
    "entityId": "263911821",
    "entityType": "Track",
    "nonce": "0xce2a20f8b13037c62b700cacfb4c1c208a63785e4e60f0a3809424277ac1c8c6",
    "signature": "0xda01cc592a538bc4696d8a6111ba699cc09826ba749b4c563a3439c53d7b2b1b4f2dea1b7d8908949cd19d3d5a1335a551449578f6b57321fe5b5fe5dedca39d1c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}