{
  "manageEntity": {
    "action": "Save",
    "entityId": "109001",
    "entityType": "Track",
    "nonce": "0xe6be4a42c22a8d1eb5a68a110c54342f55d67abd501576cf0efa84e3ef164b69",
    "signature": "0x6da8b81b05a5489b8b28371efdbc3389a4e95ff71a6a80d7f2f7eb0b710cf0a21b144e6a3caf01dbb8ace02d5dcf1bee1ba936449a291c89d98862a31e5430051c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}