{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50519",
    "entityType": "User",
    "nonce": "0x18a5b0f46d1f6e0e2c3e989e7ca0293b4df0b70fb90dd10f3a4db5e270693620",
    "signature": "0x4cbbd1edb6a04b662e69888f7b5b956b3f7bc8e54aa7b20f6cf36010db599ee832d448e91fc3609b0ff90cc52eb97e94e383dad4d1061e7727d41ce72db7bfb01c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}