{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508263176",
    "entityType": "User",
    "nonce": "0xc9c5640f868a8b1219d1d98817a1333fadf16ba83257badede69146ad47d42ce",
    "signature": "0x77bc0bff700615cc396f51e2acfd5d7b2e82e0668bf7bfa0ab012e1b712e508c302988bc26f2071aac3d96f69c8fe205599db44cd8cd953a2584f1c1e29be9fc1c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}