{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "777",
    "entityType": "User",
    "nonce": "0xea97ab017451b424c4c466b8123d5ba161aebb34ab3fbf925e80136a19194b04",
    "signature": "0x836a6b242b1559d5066654767e680d65b0d6167b97f70e8d5924b21fdbf5171a74572e874db182ea040f9b399ac99ac5d6c923638c036a39fe508cb32928b21b1b",
    "signer": "0x8df7D5E77eD5427357bF63CaDBfd1acD336296F3",
    "userId": "307"
  }
}