{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x73ac2b2259a597416f67a1d1ef3613ad2fadf0f31e4549c425def505dfc4fbca",
    "signature": "0x8e0cf3f585c37b2fcdeb4f8fd8b4b73d8d12669bd43f4f77a5514ba8a8dfb96675667ffa8b6f941c8fa346ca2d8fe864bafdfbed3eb7963fd0d65f8fffdf04cb1b",
    "signer": "0x741a85086e9F901Fc65A37Ba8d302782F5BF623B",
    "userId": "333553425"
  }
}