{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708077815",
    "entityType": "User",
    "nonce": "0x7c76aa51ac75ffa72ea4124889d9346eb33e3fd878f2907eac9c443978d21148",
    "signature": "0x38a22af6154c9fa79c9ce9e463071affadcb80cffe9f02d0303e841e638bb2700335b97bbce32b75577ef72c3309060a5533006ee9c1cdad7e22390ffdcfabdb1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}