{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "897648338",
    "entityType": "User",
    "nonce": "0x30a38f516b1b58a827cf08b94ff9e1d60429472b4a1e178987976b9f0d6bd5eb",
    "signature": "0x419eff14552c7457f5d1adabe930af4a93cc67ed148ec7061ea53c14e787d46150fb1f8659171abf6b568262c79d0ac96a6b27003ead07a31517e7643dbd47f61b",
    "signer": "0x8B50B0687712445cB22f8e1232Be42e560bE3deb",
    "userId": "487640022"
  }
}