{
  "manageEntity": {
    "action": "Save",
    "entityId": "1647583523",
    "entityType": "Track",
    "nonce": "0xe3482a09ef83fe83f141ceb94022be3951a1f870cf1b8948733011077dfeb92e",
    "signature": "0x92ca8a1293526277753bf5cc92aa788b06aef5c246b31f918f83429c20e6d1215b43a17d00020bcf4de07d0b98577c1ac8ed1a21ff067f14c92d4ab8c51f70ae1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}