{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "816709547",
    "entityType": "User",
    "nonce": "0x49d8dd92b14c320d8a4760ed45e98772f4172f4867f7a786b00072feb5d8ad96",
    "signature": "0x31ca34e6dbb8dcad48704c8451070c14583d46cc3dbef5dbb4a215f0d93d0d2c0d2a6a72198b3335c51f36ef3dbd2b3db2b3fa7db624c6601d3f605f3a8c54b31c",
    "signer": "0x378543D1f467aD15E6688fa37eFF55939dFEDFc2",
    "userId": "200959284"
  }
}