{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "6600",
    "entityType": "User",
    "nonce": "0xfafac88febca077ec6aee1dad7332823b6206f33cda0d6475a5bb32e0338f6d7",
    "signature": "0x211e536eab437b174e48a5b2f37c7b0f3c833e0c2355b9164743da62d9a8730139eb0612226e9cc33e3552af02f0ebe67554372687fec64531d70cf77648e7801b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}