{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "864400174",
    "entityType": "User",
    "nonce": "0xe57e40ef436aa6a7c5729a9a01e2e5eea3c012df97eb70bf23eb50e46eeebf94",
    "signature": "0x666b3a491328f3b13f7206e4cbc77a4bb870e1d703baf74a49894e9d2a0fa4c42455a881f7d55472ebe900291efe8e29d10501c8fa6c32018b8dced9cafdcb9b1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}