{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3290",
    "entityType": "User",
    "nonce": "0x1b75be306de32764543b16c8525484cf7ed299cac1fd01847d3e3974c6b47b0f",
    "signature": "0x5724d74365227b6c44ddf5dcea292f9ff4670540a6abbe2eda710dce518ffa780cedc0bf06207012c3005164b9b10541c5f40535ac70dd95b9b9199cb6c4ac631b",
    "signer": "0x99AaF394391f38E675C75176629C26587f8a8322",
    "userId": "167325"
  }
}