{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x412cf627f9ebbecc0924ac4d6d9a1dd1626056a0d9b7c67d8c9409acbee8b619",
    "signature": "0x7bf3b7c9c2b3fa1ec51b2aa1eade37f8e6c5608c0a12560c8c90ad5802f109387ac53ab0ad5c4cea78f81d710a3cf970b2a47a3590621d969386b6eb759dcf371c",
    "signer": "0xDA50ec141B063c6e509d2D4dFF21513a254a5BD9",
    "userId": "281170788"
  }
}