{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x016314e37552105732ef9f49c44228ff61a3e83d374a9b2867be1da53cda8e97",
    "signature": "0x259e21994d87b8f90f181ea3962ba83aec7d992e075d656c046cfd2e2af0de3a1952389e3377faba2814ec6c509597cf7d4f5ed235e2cada06c048fd5b4dd7c51b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}