{
  "manageEntity": {
    "action": "Save",
    "entityId": "962563917",
    "entityType": "Track",
    "nonce": "0xed00cd720d6cbcbd20b4eb5d4ac43b0dda72c2a525f52f07513576f127cdbe34",
    "signature": "0xb3a76ba3cee43d39707457b0e82bbf8a499ee84e362acce9676adb972d203b666327747314573e63bb5a7498a78adad42e1bdc848f12d2433b72c8e595adc2261b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}