{
  "manageEntity": {
    "action": "Save",
    "entityId": "335511198",
    "entityType": "Track",
    "nonce": "0x5b6efe0ccb380d5f7825393812076f45c3b9655c960398393c7bde63dac2af19",
    "signature": "0x44f3519d3ee17ff094ef7faa3f0b7f303a210574d406b1cde28811be55383c6e6d3da669d6366e129f108a9b43c75b0fc835e8fd7f1c733b0c1e244726901a751c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}