{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "977881607",
    "entityType": "User",
    "nonce": "0x803004b458987eb6bcb902c6c3319e55a0ef02cdfae0341ea8f95d8883a69f39",
    "signature": "0x4a1d164bfeb126c56c42b21c40d82bb6fb12d13cdb8616a1ee54bb7a1cbe69e31465d7baae42b7f62707804756e8c05ae629dc14ad60e533c992ea7618dd3cc61c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}