{
  "manageEntity": {
    "action": "Save",
    "entityId": "463331",
    "entityType": "Track",
    "nonce": "0xbb97f08b40c06cd9cbfefc7519fb0e4c8265f94cd1b774a89d73f9072c218431",
    "signature": "0x417dbee06719bd53d8e49e727c3e1c0059d9874eb6fb7b1262c79979e8ba6391535fa93c64a96df9727abbf1b6a845988779f48c00c83299f1b5449e4f232fc61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}