{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x2ec468a8447c76b7ab462d165f06e12916f0ef4378b5e5c3f664edc23ce63f21",
    "signature": "0xa3177eaeaf8923fef4df9e4c5410a587e96c82600799829da54cf8997128a86637b951da5a795fa7e306591df6cf12c2d8685c676ed7f5b1f4df943a2db2484e1b",
    "signer": "0xbA3b8b40E01e91bCCC95B282Ac3C7296EBFdf5FC",
    "userId": "457584438"
  }
}