{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638733607",
    "entityType": "User",
    "nonce": "0xcfee0dd2c03b80fc0569439239871d0d819fa3daee3d4d0b701396ba9c40a9cc",
    "signature": "0x2538fd637b424ecc4e11b18f2a5e7ffae0cdac8542ab7f970144d035a47aba2c1b1ba3dcde4b6892cf4783330fb6a7ac15e95c8540b73fba7ac9e09a6f34d8001b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}