{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x43c51096b52e1c0e84c48fbeb9494414caf4e96843251de0b20eb890acc6f2ac",
    "signature": "0x71ac7bc7bcfff6a2c7a21f7306b4a8aa653dd5ac86225022168e3c8a5dca662224d1429f71e2c06cffccdc0f0419ec8c2e167dbb19bce53d31c695779488f86d1c",
    "signer": "0xa4076fd8DbfDD3f5cf89D40D3621CAdc819f497E",
    "userId": "949258678"
  }
}