{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x73cacd5fe6d110301c48d581f98d51c25c915742e8b713adf3e03fde06d0a3a6",
    "signature": "0x73fb7635ffa02ff595ea8abca4f5cb161b3968b1a5800de04af415a9d46cb86e3dd4819213320ab1b850398efc55e4d9b91e1b86b094f3586f2e758dae2b6d921c",
    "signer": "0x0768E91D0D36720f8378C897B2f8Bd7d1340b80d",
    "userId": "616237734"
  }
}