{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "817540238",
    "entityType": "User",
    "nonce": "0x8e15f5b163fd417359496e8c0236db90cde96a890864ffcc53882b17081921bf",
    "signature": "0x9d4296c41a9a777def4ab70b2260b9c9b8c23470f6fff3e357cd28fc30c7f4a5148f9cdd1a593988c93e4b4ce72145b5e99fbd42b87c733ace9c6ec6247ec7bb1b",
    "signer": "0x66A7dE58efC6d276936b3CD78dd14AE138cB4d02",
    "userId": "858962164"
  }
}