{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390193787",
    "entityType": "User",
    "nonce": "0xeb7f77d1614224d4b9a48c530372500591a430f7c20c355822aac3bf77cd0f1c",
    "signature": "0xe38679984d951fbd15eaef06706e0c8a194dbd1fcf8462affec301b475b8abc41c1a29a60455de4879fdc631aebcd32c4e2f0799f7f407c3ee38cc2e4b73ebf31c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}