{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "887547386",
    "entityType": "User",
    "nonce": "0x4c4047ba9f4da5bc0fb870400325c4e7e591e7e390f6be0dc50fcedd1f772f75",
    "signature": "0x540efc650c7cff4a1993b7c6bb5681fa76c0759d8c677ec90e1f3c889635b0b15fee0d0a388fe1a47eae9d0cb077bd8ab28811902241a5dd1a925cb1fa9354141b",
    "signer": "0x721f076D6fdC57634d612324093cA69B47866867",
    "userId": "303348966"
  }
}