{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x13902051dbc866311017243febf6c0ebb9a6f91fc9c82d287f23a2b1b1f688c2",
    "signature": "0x591997892f66a6f7e4271c4eaa2603b551e86eea175633084026871f38acf45c0f2d6c82945ca4245d9b908732cdefca07057bdbd82de0ef14e91805436019de1b",
    "signer": "0x49Bb2188f71Ab4009cD62D4890dEE210714d7A58",
    "userId": "773547442"
  }
}