{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf20978db8b60e9bce23bd574f29c544bb0dfdd557a84d7d7d6f8d838846ea115",
    "signature": "0x482c3573d729160b5f342382f44e86c70444dce923a889e362723102d7be2fe21218c7cc646cee77f9a9a0d57c359c77ef01626a6445e005d0e28fb07272cfad1b",
    "signer": "0x8421ed72704a6dacA567d96a22930F6D379695F9",
    "userId": "387435228"
  }
}