{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb4c4479184d6c4c4fbbda140c52376b8be166589ae7f8cae486f3a6e32235541",
    "signature": "0xe87112f45a88e530b17017fa7fd59838004f9adb472b34af4e7ef092e13cb1e3500414128f175b4e61e8ff24ff416caf95981dfaf978525b780398570a74632b1c",
    "signer": "0x15C4e98d4Ebf8E243E9b57E013521974f7F206E1",
    "userId": "115948443"
  }
}