{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8bc5e3304a71788d4a911299423461e6f7ddfe985d9160e168f532e466af3404",
    "signature": "0xfa9b031c9f8650460a6f10e279e6fdf100e3f1405d484c864bcf96f1677727857c4116ea837ce9572324bca33dbf67ad8229f39cfba17783d02192da0e25149f1c",
    "signer": "0x407c7ecBdb58F8E513Fb1E3b4a764F67470D2f21",
    "userId": "955023200"
  }
}