{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1e875be2e53a48603042968c921aa8f2ce75e0f8ff6b98920db5afef5f67bb64",
    "signature": "0xcc20f4409369e53d1e9c49ba16e615b1a75fc4f02c49cfbe27aecc37d0411f5b73812a1139a81101f4259f6ec9831e1edcbf45dc9fc9e3ae4e0f29479fbbd6921c",
    "signer": "0x45c17D77862c158Fb597150A8F805a0872511AF4",
    "userId": "55585594"
  }
}