{
  "manageEntity": {
    "action": "Save",
    "entityId": "495558852",
    "entityType": "Track",
    "nonce": "0x6b2c67f87d6ecf8294c66b44b3c03e3242f742e55727f5b1791a2a7523faa9da",
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    "signer": "0x2B28feb1CA15953a5a910C4E741698a24e8b3FE9",
    "userId": "887020893"
  }
}