{
  "manageEntity": {
    "action": "Save",
    "entityId": "716251161",
    "entityType": "Track",
    "nonce": "0xdcd8acf56227c8983e15be6858d0cb9d10050a5c51ffb546d4a1dc9b6cfd83f5",
    "signature": "0xaf6952b4ea5eb12413038611128c7aba96228656abfe2c4b38f5523365eb7f950d314ec8878d047e366997150d07465a0e56bc346408da2b037b5394e715ee8b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}