{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "335",
    "entityType": "User",
    "nonce": "0x51909b984216c3ffbb1bc6b42d4c401495d9256aaf080ecc52d09fd87880f45c",
    "signature": "0x9eb22a27e83aae203fc32c4d9124a4174b5a808dbbcf89039524503d2b8ebb6f30f2fc6d74a38e0f2be40cf1384ba458ad778c04b5ac295af46a3ce5e1578bcf1b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}