{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098408500",
    "entityType": "Track",
    "nonce": "0x856bd77293c7c673b9c6a26f9ee540fda54132523f05f12bf54d428c0f0f962d",
    "signature": "0xebcb38f1221391ce3b7d51a08406b550a38480dafe0bcd1ee75b768109df72893526e5aff9c0d56c988780c06883010505f0bdf9e2473dbd2d689f9390740e301b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}