{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xdb4991176a5d8555338dd722f7ba9cc0ea80d3ce99f1498e21452486777c49f5",
    "signature": "0xf069303a4c48de9075ae7ffa1144872cdb6125c6bba0da44b087fa5f2569dcdc32fe00370daf9f0897b1a026c70b6247f51e74035ae51b57fbd63189811811401c",
    "signer": "0xf5D2994DeDCDBfea16EC02bC7C53819B8A9978C4",
    "userId": "121355263"
  }
}