{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb562da325e502e3888ba08d5861904b8d1bde4ca667a94796c8889827dc3a964",
    "signature": "0xa4b209984ef87832f49fd0845f2cf37eda0c8f7726b2b086b3f4c93b669523104da3f5dda5cde517285f4feab000c88c0aa981a8cc92b05df4f5420556af65101b",
    "signer": "0x57d13aCae5c2Add3260b4C787f484609E32Ebf88",
    "userId": "870811484"
  }
}