{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xe6f0158b76cef84035549639ba87ea368ec5ef0cbd2c77c735e4360beb24a6c9",
    "signature": "0x3e39b468f203a1b2942327f2d2d7c98ad372164b00f79a85fada53d52212318d08723eba783f6c98311a92aa58f420b1c5ff04e0955adcd19f4140585ad74cf81c",
    "signer": "0xCf1fA5Bb75A69383D4A5984Df5D21782728C8346",
    "userId": "666681611"
  }
}