{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd722d8381ac0b12a3442a82c3f252618507642aa50613aaa91f381f3b2c5930b",
    "signature": "0xd9ff4f897047c3195eb55c2773284b7bc4ad8cd2a581a062855a4c3bcb06355b7195d5cc8615a19516477a8690220e9e5e7bff37dbfba5ad560bfd6f5f54e4711b",
    "signer": "0x75A811558bE06fbcFb9F5a71f44bA68DFB465343",
    "userId": "417972814"
  }
}