{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "340618",
    "entityType": "User",
    "nonce": "0x19ab4859fb08b01bb557cb6c738b34bae7e3430f58bcafc99bb1656e46449159",
    "signature": "0xfc334f6e70d338a1cbfa6bbcd7d2d5be473409f1acd8056d5a499f651bc0beab589e50a2e9be3f2f6420ddbe41ccb8d30abe9bd9fcb60bc821ccaf28b3dfda0a1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}