{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x35d902fba261eb592478b1d2d3044e0ca1805542ac31994afc83a3a77a2f8fe1",
    "signature": "0x8f96e40281385d15bdc41a099e3b6d17498b678cb222d5088dda1230b832852876f5ded9db562e37954d6495062d43ae12c328650cf3e503ee5a00891aead5c51c",
    "signer": "0xE61b4fA720A4327Fc15B349039A5518aa4F9f10B",
    "userId": "789953892"
  }
}