{
  "manageEntity": {
    "action": "Save",
    "entityId": "893676006",
    "entityType": "Track",
    "nonce": "0x3544d0194e73bafb0d9e38b95dcb956d3854f979fb31d8a8bb7f89e64f99a7a3",
    "signature": "0x5bb5a9f1eb8b575d3a5da0160ee2af431493b11a24ecd02250060f80bd1c6e2673183789a38bdbb234ccf3c16d89141faa5ba8fd42e05ff72e49c793e17f395f1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}