{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "555663956",
    "entityType": "User",
    "nonce": "0xff1a951da13bdbe19cc9e2f1dea216b6c49e08de3a3d99f78116fc148ff7938e",
    "signature": "0x482d511b3e30708b1d4a9bb0e5dcff9ef0d2259585c41f8bbfa182898ed7d5fe78d12380f58bec96022ee6636f3f973286c36952b774016f0d4675428b4d31c61c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}