{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401426017",
    "entityType": "Track",
    "nonce": "0xc621a11bb5a5116e207f5b71d79938bc46732f7b5bfd68f52b71284e3dc8746a",
    "signature": "0x458094c20c6e636b2e94786cf907fff87be3530296c2b2acd1611773f6f6d4dc4e63a30de10eb5caea527c888c2e4ef4a5b7ceea9a90dc6fe254c7f04f4caa1d1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}