{
  "manageEntity": {
    "action": "Save",
    "entityId": "214319100",
    "entityType": "Track",
    "nonce": "0x5fbe9b5dbfcfb05780b134e0276053032c0a88b94d15f439b04d54881c60d66e",
    "signature": "0x5053a412eb2221df497fb5331bc3a38627b3b0018223fa206f51a4d76d03e6e64cf82a36eeb9e5948432ade0ea966888702ed9413e732a0f92760f6b6b95d6af1b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}