{
  "manageEntity": {
    "action": "Save",
    "entityId": "1904842813",
    "entityType": "Track",
    "nonce": "0x17be8a72beb6b825a19076c3e293775fa488723c4e7e71ef891401d23824e1b6",
    "signature": "0x0479f58f7116adfe7a44d097118bfc2f68874e3ee15dd3db195fa7ff3960c18f3f84beb420ac42618dddbdbeaf184c554f94dde90edf00c62df212d2bb8db6201c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}