{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf4b0b8efeebb45d6abb8beae31faaa92b25d3bda51467f30b30de48e72544b9a",
    "signature": "0xd3fc1eeeb5ddbe30555eeb2c63046bafafecf07ba4e72ffe461945af5dd875481e39d17f0b70595acc5e333308f6631b7480162647de824fccef22510d5922451b",
    "signer": "0x1d7977a438bBF99AafdA2633A385c2989813552f",
    "userId": "447156818"
  }
}