{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999548897",
    "entityType": "User",
    "nonce": "0x497e8247f2d277c78664548363a0b4162bfe1c791a58ee360c09eda2ef75be0c",
    "signature": "0x6e1bfb3a1e00c98baccc3d59c56463ecfdb6c73e83b1be436b1bddb5e67a11d45ceee9a151e365482f47291a5fc298a5ac8f675477a51901714d8469c6575e3f1c",
    "signer": "0xC7D69243b2161915036b32017e4FC8ea02d7faF1",
    "userId": "80378"
  }
}