{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf4f3a9f6e2c142296f6497cdd6c524bcddedef5f3be778cf99649a434a9f1e07",
    "signature": "0x7ef3f8d1635eabf4060ea5846d47c4cd3366e96eb0b71b16c43d8d0d98ad5eeb56b474fe47a0bafd539e72063dabf081a9daf8c970f77a4ca4b7969994701d771b",
    "signer": "0x8A4812fE7411C70706edC285a86d4AD5907cCF91",
    "userId": "723565880"
  }
}