{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537204477",
    "entityType": "User",
    "nonce": "0x791fb94fb1f0f764ba91fba8018abae3c5b2397c768e75a0953862e9800235d6",
    "signature": "0x56078d754f8c68cc42df48e1c970cabf42f0ddfff1e3d1655781d0e88a1272c0625ee083b4ab02eb0168e62b5af812ed630fbcab87cfa26bdc946afecd4665941c",
    "signer": "0xfE8b7901289A70702AC15CcB11911b872E54e80D",
    "userId": "540022120"
  }
}