{
  "manageEntity": {
    "action": "Save",
    "entityId": "570197362",
    "entityType": "Track",
    "nonce": "0x55de7cbbd1eb638a694694622f7082ed5b9cc4cdfb49475668a60407a0172fd4",
    "signature": "0xb07cacea9fed1c2c1bb8684c432bf5dfb9ac89afd002028476f17df68ab20de17fbc698306bc425e701e9c0630939dcc64dc42b503597616d3fb7a66e80f50e81b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}