{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303",
    "entityType": "User",
    "nonce": "0x73ad94dd07250ddf9752d84e6a4c7199e109af3543e1e0677c0ee70e915be764",
    "signature": "0x96212f294a8c9be66bf80d533359f8d9ef5f122d15ae6ad66ae66b08dfdc08cd79a9a04af3cd2fcdd252279c5f5e65567d275f7056277ee7daa3216b4f0fef991c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}