{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9e07f59ded417faf1d8fff55fb2954f8c5fe3a9a16b4f1fe83ed33391eaf18d7",
    "signature": "0x45c620c48346036357519d1a875eb542c95918cf85866e2f880a711574343c163165f08560d90e36d18ea30461eb507fc1f248974ed5cd66896eb7bfb308dd571c",
    "signer": "0x4c5AC7e7680c83116F534d4e30E2061A8D8363AB",
    "userId": "311402344"
  }
}