{
  "manageEntity": {
    "action": "Save",
    "entityId": "341039",
    "entityType": "Track",
    "nonce": "0xa46f4dff15970661b04fadcc37ae0cabf052b4ae4b76c4ea0c4ae388d1b40a3d",
    "signature": "0x5f20b9cd452f709ba3fb3eb95ee24b756df5814cfdc0874dd61afbe6cba51d9b2fe8adef839df0a20dcc94f141f2d7e84bee1bb6978e7f29c74f6fa2365dfbb71c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}