{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "456631837",
    "entityType": "User",
    "nonce": "0x491ad15a1c2eb2873570039de4fa37ad545da7eb82761911491f6b595f5bb7c8",
    "signature": "0xd71a4daf6d00dd85b54dd56d351cb9b3ee135fc440db4d17a6fb2fd03ff1d52f7fb787f99aee2b379d32d830becdaed6c71889c5950466e4b1c0e4aea1848e481c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}