{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "78123",
    "entityType": "User",
    "nonce": "0xf5f1e4d6da6aa3afa917fe9391df988df8fcfd472e79ba1075f53b62a90ba712",
    "signature": "0xb01c64f9472a7097e02484206068ff651e9a8201ee7927bb5fb5ef6312b6521521cb09b8b4fb0bea8c21b35c0fb893ff389c77c11589f132408a033b47482d291c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}