{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21139",
    "entityType": "User",
    "nonce": "0x80f0cf0d9795bfd311b5dec309eacbba62ed316f5fb4a375afaca88183baa61b",
    "signature": "0x08f31de2c893090765eebbc4f51d912f81e0402273d357eb841e0f00a3ddda0c57927547423abe9f4eeeb673ecf557ca7904ff8614548b85839c7c8d08f7b03b1b",
    "signer": "0xE795526f098824a87a94C79d58a4299b51b20a3c",
    "userId": "837713671"
  }
}