{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51815",
    "entityType": "User",
    "nonce": "0x1f955dfb69f4b5dc7f1fad476f1fc2ccfd6de5d0d8ac4b863266de42d47cc6b1",
    "signature": "0x7ff6861cfbcffec164dc6097f3d0bcc3610f1ab102022c555c53957c44110cc579df1875e660dfeffefe357e6b1dd3b179c4ce545445d90e1a9c72b891af84441c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}