{
  "manageEntity": {
    "action": "Save",
    "entityId": "854783",
    "entityType": "Track",
    "nonce": "0xcce98be015e800c05827053157ce570eb67a4bba364ba22f96a77f283a5876db",
    "signature": "0x07cd9781d60da8cd4c6bacb18fe5552296cbb25000753355e245506aff1577940de08d7bd6f30a75e1d427dc50bac71526c9a1bcade5fa23d29bdf4c1a1f073a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}