{
  "manageEntity": {
    "action": "Save",
    "entityId": "1317881739",
    "entityType": "Track",
    "nonce": "1792355876622901969",
    "signature": "0xda22f9a242484eabc8f6edf14aaa31f9723d898919f25c18c26f4da42e93826b38296c2678e4de5c9383626f9a8f894cd63de75544800c0ba036a9509bf656521c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}