{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x594881b2766b44c9d8e6f6f7aa2554bce0ca34d9d694d9ca04b63b5b8f3cd1be",
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    "signer": "0xB3440fbFBF750C33EaFF74d2B67dB33Ef0a6682E",
    "userId": "521950017"
  }
}