{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "326509",
    "entityType": "User",
    "nonce": "0x6400556beadc231c85a8155377395b09ddd03140330117b0a4d22275a10ceb66",
    "signature": "0x3117e361e724e079a82dd29b87e23107e0834ef07cd7fdef5269a0d50f0c7dc534027577f7cc2833df6534b0346698f794523408363a1209c19148f824fe55b21b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}