{
  "manageEntity": {
    "action": "Save",
    "entityId": "578053711",
    "entityType": "Track",
    "nonce": "0xfc6cea68020ea9466816e2468f289db9049adb8ed8ddc706c57cd46330ef1c33",
    "signature": "0x4997cb84a9b61a9d7f6e50b519e935d1722dd363c09085ee923bb7df2327cd1b27fb509a5b0c00e125d6bb6b802d9ae82ae15c195e2de31184ea359bc1d7fffd1c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}