{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "781543844",
    "entityType": "User",
    "nonce": "0xd97ee1a7b949055541a9bf501b7145c357f3ab100511e0dccef4d5cd1d3f5851",
    "signature": "0x026fbebbfef787710d37d8466d55c14ee12e469d3c37a4b19a1c27f340aae1a852d977b8617d58f4f27b026db4a2334c82dba11e9dea3547495ad0ff77df9ba91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}