{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf5711d8461f4ccf85759eb98ea2f66662e63ea050f66fc23b80b1d6e83e78825",
    "signature": "0x3ea907e3f5ad3f3ddf00216b8e21ed250b8187f5febee18691e0b155376c0fb5739edeb017f3b6ae43e6b30d497b5acb8213c39f109fe0520f4472d320ab4a601b",
    "signer": "0x6B4CB8664E41AB502212155456Fe4feEDeA85555",
    "userId": "463162548"
  }
}