{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "556395670",
    "entityType": "User",
    "nonce": "0xd09a49735100f7bf9c7f99326a4f8162224ef3190dd98a850adbdd027d43558e",
    "signature": "0x40be1a35cf0136481aafbc8d9065c62bd7d83602a06fafb9113f9bc86b8009125ecd02f2b6702c9b199411ceb1cd2b5fefb2705ed0911f37f91f8f59c373fc201c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}