{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xea2cd5f6495276a26533914a7035ecd23916813ad8e7b687c865aae27a1a5268",
    "signature": "0x75640e20c0f100a318b7e4aaf3ccc34ac6a1c7109de44c180a3b773d10e9036e4ef668806c131233fdcf57bb0be5ff940f928ec7a7abee7369a140da565ab3a01c",
    "signer": "0x147DEFd16b88242B34dCC21ac4C4e06004BBbcb2",
    "userId": "721077896"
  }
}