{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15989",
    "entityType": "User",
    "nonce": "0xc6dd3f202f8516cf53a2c59824f260e737b733719ed96151324cbaf6588d2b73",
    "signature": "0xe555146b777372c3511a4d75e252c7a21934ca2a9bd9425123bb50350c08e5f76c3e469dc36006d7f0c7f0662461a6dd526def37a306f904bd3aaa968a30cde71b",
    "signer": "0xf955397B294667924e7Bb7F0242060CE42339111",
    "userId": "142071420"
  }
}