{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0x360bbfbc6b6dbeddd0a1148a80a97255fdd4dc47dca38e4917890e5b0742d5c6",
    "signature": "0x8544075863565a46dbf8cb8b097fb2fa735669ad1a76d6171e7faf561c8d72fa6c21d085b8f815ad9c5714bd4edd3046a88139c1cbad3eab0ca324fa85e43ddd1c",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}