{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7a9cf995a1d232e6dff72e24a5ec019acb9b731a24a34653a159b2c42cca2a43",
    "signature": "0x4329e262b0f7d9e711364a5a3e7a9b57af362b28faebd6c4ce6cbb9db61452231b7848eba34e7ffdf0c164b44ad03feb927ed51d16649ebed27e8667bb9e9c491c",
    "signer": "0x7fdeEB144300AC6b1Be0E83d8f006b2D3140F73D",
    "userId": "325377357"
  }
}