{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x142d18000f087a5de5ae72cef16379b93aa7135c784b5df902d1672e303f5df0",
    "signature": "0x3dec33ccc3ce61447d2701a4eaaa098ac08676cd5d28271b98beef9123d5fef56c02396cd17228eb7808b738ddba7b0b5b00b5eed4c34d5d4779bd96365fa02c1b",
    "signer": "0x68D51d6a55ACf434B7Cc31b5f199050961c9f04f",
    "userId": "607013839"
  }
}