{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xcc9d51e2107bd1c0fed61d71f7bc8828914568d4552b6334b49b28c400897dbc",
    "signature": "0xd697d465897bfdbb10b2d5016297905ee3570582b9b62d523c2d39d312bc491f6c1e8de7243b8dec5818b8dc42b17f29da11edd13b2f4c2062b929ff09f711021c",
    "signer": "0x2214D6699cA8Cd397c6431c3202b2C4f596321F6",
    "userId": "409693605"
  }
}