{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940729258",
    "entityType": "Track",
    "nonce": "0xe9e99661a8e4b5164a4c55102095dd06b5f81e7366e1c05c64440156a78296b3",
    "signature": "0xbf0406595b45778d5d415774e0d6b38ccd48eb0de4e40bb2f402b351ad2196c516fe54395f8be138eb7e009ea490f4b73451907ad805ebcd0bc51ec81dee48f71b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}