{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4c191f855f164ee862c2f2ae0a3c7c2029eaf31b6622823c5498689b29802df5",
    "signature": "0xd55adfcc7786d2d69aab322cc9fd583ffd7b234ed4a6710ee72a4823bc9b70c319e17b3b2dd89096e18cb01da27caa793da15651d1b13fd3f9357a4e04d0f77e1c",
    "signer": "0x4655f3313c8218Ab2B7384fad47CEcd4FEB5f243",
    "userId": "854821388"
  }
}