{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0xb41d6751cc6db90bdd94e37f0c4b0c83a8a5ef5d44beb351b9cceb9006c5f158",
    "signature": "0x5b2c824651c0bbcfa5832f7523d935815da079b62020e36e95f46aea8555ff10484126ea43e4b5bd4b80159783398e73e30eac7781d7bcae9cc45e4444d566051c",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}