{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0xa55595472f5a395ac4bdc7112f5c4b87214cf23e813b8fc24c4f870ccc3a1f2e",
    "signature": "0x8302d07d355fc056b70a7039a11776d7deaadb16b2ea1005e2e540ccee306db51fa894f664cb8ba42728ab091834c1b26f8a14b4ba9417e460eff20aac57243e1b",
    "signer": "0xF300c20BDBB459E009c4E55c08CFd33E12f8B0Cb",
    "userId": "782218508"
  }
}