{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15669",
    "entityType": "User",
    "nonce": "0xc4e3ad1d76f45c89ada833652d4b21cd09e950bceb6dfccb688f91886784fb19",
    "signature": "0xc1277005ec187c9605cd17024509fb868c9d549b0b6e50036029e120fa9e34fe67fe4cf8de3bc6424900c1331918d0fe1359af0274389acd95193466fa3f3b711c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}