{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4662d04dd3a5a444665b11b38dcdc3e495a1d2d9b3a5d0c3cc0126cc30a5c094",
    "signature": "0x1aa611344f2d1b99a68d6b557e6703ef40c96623d95d4837e28d72caa5d0c9622a5c2dbe2f7d6ef1da58961d90fd51ff68017ba53a64dec9b82c0db299665a171c",
    "signer": "0x12945cC9FA39eCBdb8edEd0ffeC0233A1b46E062",
    "userId": "27737813"
  }
}