{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6676f085bdcb859b19fbe6d4152c9556761f57b89bf0ff9947c003f5d2523a19",
    "signature": "0xe389525225f459db3a1b2073598b8e0c0d18edcbd14471c72875c139951203f05733d664115265720581e357da2a2bddd5785beba9bf221624f1d3910db208f11c",
    "signer": "0x3cD819677715E5bEcDcEF763756294f39C3C044E",
    "userId": "561576876"
  }
}