{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x03b49fa1b5624944dae2e40d9ab506ee2fa4a53d439fe2856bf0a61d1d8d2ad1",
    "signature": "0xadbc0ddd3e049193afff4c266ebad079b0076f17010ab8e5df1b32963d9f4c6e542b931fffb3ae31ee0ad582d671cffe98b12017864b9649e85d134521b516fe1c",
    "signer": "0xF71c101985A7BE4e05869C74Ef80DFEEFEaB9F64",
    "userId": "74570167"
  }
}