{
  "manageEntity": {
    "action": "Save",
    "entityId": "1987915338",
    "entityType": "Track",
    "nonce": "0x35e6cb6a66e566b091e1f1b9f05c677aae2595bb8652a35f7e5e42d4115dca30",
    "signature": "0xb390e036dfb160d57c29b32a76532234754fa115fca8dec369d175bb435821e74d57a9f6738fdc8b7c041f59097fdb942d4f69a41de143baef03e6a696d581fe1c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}