{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200945",
    "entityType": "User",
    "nonce": "0x4b9ef619b02c0aff1d87777f0217606aafd7aadb91b1a4a16acaf18f2a3b9a5a",
    "signature": "0x1371f4d04e4dac44a631f158ec98286055d183cfe9681979faa065e2c37f4c603546016f965fe4bb96e6e420c6cffdc373245cf7f0325cbd8a5e4e1e635da3581c",
    "signer": "0x975699e892A0a2f2f16d2b8950Ac7C882B8EF555",
    "userId": "544952248"
  }
}