{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x3c4af4769c8a89edbdf6e84993f10b47e727e79eeecf904a013f379fd5dc1def",
    "signature": "0x9f3133954668914267d7052eecc61db758724fa31036f9390ce03606c49c19b00669ac71b267d8654680c0344e42a14eef8b99aa88d27cf05d7d03c125ba91561c",
    "signer": "0xdF9487164dE2249ca747A2fC5A6dbe6D6392F510",
    "userId": "308281501"
  }
}