{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x43e681398536c2055baf981e39b67e66146007075417b71845f4e94bac8d5071",
    "signature": "0xff2a45111ab4dd353df52cead989b702d393a7904ffe0bf9ef8ed41a76e5c6b27462122de95c34c7cee25d34936f6a1a429a695d6f4202b5835699c70524af631b",
    "signer": "0xe78f4db0d7A07c6560894af54fAac97902D8d04b",
    "userId": "406109114"
  }
}