{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962253934",
    "entityType": "Track",
    "nonce": "0x05b5d3c7601eaf745c9f090aff0f2405ef32fc74eef967f72ff1fd699757737f",
    "signature": "0xc695c4ff11ed212f62191b213a34400ffcbb9a6ce1c2099eb046198f62ae6940506a777269072994aae026748d52b42c6f00821c2f6b6d33e617468d162256fd1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}