{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x6f2bf38195e27b4a77657bbc1c0848686f325bd9fa1b0a807bd6ef27a0641995",
    "signature": "0x85206530fa10375d17b7eafb55bce896458bd2d35ad922b20c8d655896a8d5b53db44d069689d2979b18281b586d6e5e1c97c7505a5242bc5892abfe528760941b",
    "signer": "0xdd9866f5231155D8450f557CF6216590fAeE2900",
    "userId": "697765896"
  }
}