{
  "manageEntity": {
    "action": "Save",
    "entityId": "1741388514",
    "entityType": "Track",
    "nonce": "0x37118b859563ff854710d8d2698520b839026e17aa6e22f08652664309f8194a",
    "signature": "0x4be05e79144753783e672d728a1e167180ea109aed40f942d77bcd890f0f4e803cd1b5c81bf75c892576b7c7e148b47d4158833ca8ff8e04bc7c42e639567d631b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}