{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "966718637",
    "entityType": "User",
    "nonce": "0xa322fdd6e0ec5dc1d8448db73603641d0baf3965db74afeff83070207d358c21",
    "signature": "0x341cc2ec6f1c96540a74a4e39145ee54ec8a0241890732fe4c1097b1978571f56de503708c55b2c1f1ff9730c88a604b0194fe5f2f85982b6a3d595cdb4ee25b1c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}