{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x21ad8c5b8c61879017d3d1dfd213cdbca867be4f674e9f2ee6577a4ba508b569",
    "signature": "0x811fed6ea6e6896082f1213dd5d778ea28f4e7fdeb3e6345ee77b629cd7b741f53df82c44e74928dd493e5ca1826619fc1eb1b23d94c8d3f57dceb8fa8654a321b",
    "signer": "0x84Ba6409f51c98704af9F6B5fB71a8c9CF0a6661",
    "userId": "912395548"
  }
}