{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "543019271",
    "entityType": "User",
    "nonce": "0x5a7df3de4ec933e2dce3927cc79e7c30d9a2715d20bc91c0eda53c965828dcb0",
    "signature": "0x28032ae2dd375ac6ee4624fa7d4fac4d7f5a1bbc7e29eb60367d54c523376daf20b5b8038b1e778539bc983b73028294d07cdd5c1f7c7d47afd0e1879b551aa31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}