{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2530a377021f1458f036507bbf80b09d4ca5e372985867ee8aa17b5bdc58fc7c",
    "signature": "0xe77e55e2b70d2db5035b1b289e31a583cf7d27d209109e5ffa7359328a76c62a073eb0fb06e8f759704c7ba20b205f15bef071c90f537d4eece10dc53ef25c761b",
    "signer": "0x20a821B898F6Cb6BB0E5FB2460eD4225B40Bd68D",
    "userId": "198400104"
  }
}