{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123857",
    "entityType": "User",
    "nonce": "0x6e3cf57497a6af00b852f928a032affef139bf6adf7c1d048ae9f99e0bc6081d",
    "signature": "0xc9a0901787f282fe45fd52b26c1eb90026c29c2e684b8370243b679d9a909d937e4b10777f1c579c68fc07e7fd8f5725792839202247689bdd7750bc2c175a391c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}