{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xed957fb00d7914d7349bd9255a4f156afe88c7e48d3ef51d5c81ea090612aec9",
    "signature": "0xd5e8194bab8efe24aa695a1767162c907c90caffd99ce2cafc419224e9a3503f5f7d0d9e130e8b0a6d9bd4bdb0db6a80bf09212a9fff91dd9abca0adc359a32a1b",
    "signer": "0x5042cFD9AB1347cF366E53d7BCaAAF6B75807c8B",
    "userId": "303119674"
  }
}