{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0x7c3d5de929b7f1f2a98fd00fbd8c6d139b4970191786bf8f8ab25f99eb95e01e",
    "signature": "0xbce9dc6a0ff870a17aefa793b12a8b5656da770f9a56729f9b3b6b90b750ca575db480b05efcdf18a6687fe43a988275db700ab144282cb10b7ba735ef92fadb1c",
    "signer": "0x15A1679B5B40F95A49D54741E1993518dc9C2129",
    "userId": "819951979"
  }
}