{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900",
    "entityType": "User",
    "nonce": "0x543e4f0e1d80dc691acd7594b882afd386ec6ec6efbef82219c88a0957bf622c",
    "signature": "0xb0d93f35eb11f0f0e3beadeabbbb55446df982fc6c273c6e23d5fdab5a338b606b2dff1d4f39c816b72c552e2b91a50b6535e168b8e289347cf60d405b8317351c",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}