{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15642",
    "entityType": "User",
    "nonce": "0x475763759e381127966cc857d6ee050c5d7e3fc54562b9536ba5d3844bd0f897",
    "signature": "0x1a5b949710fb0894263aa72fa4ecf97db8911fd34f5b791c22bbbcac82909cc54015f323604d7b47b676cebed87f9a6dee9385cb423f2d30f0338e2406b8a2bb1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}