{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd4b70ea75ce9265d407e66271c4e159aa4962eeb11ce0470ca41ff6dc5da1888",
    "signature": "0x4aace9ee5b99d52989cd598147eec0ae54dba45788758da6a760899afe049a7c459551f430e192c09e0d2b95a08f2d15656b96560dbb3f1b8b016800e66d13371b",
    "signer": "0xa4A3F3480fA190Be98764c41851DD9969f3A80a2",
    "userId": "23420474"
  }
}