{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x98a4e504d7b0284679fed98e0ee456f9d919f4c3bcdce7a22a2dfa625ea73844",
    "signature": "0x6682f86d45b20987db0437b966df3070171667976c71438b3b98e92f15afc2406297f77011cda7647533d6f9f8083f0cb4ea89ed3d7993a6c7729e8dab95f2c11b",
    "signer": "0x448376AE1E7982bC4C7E683D1c3D06403e48c3b6",
    "userId": "309146221"
  }
}