{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x78673516009ecf1ee3a4d9cedd0db5fa8ce63e21d62d02d0de6e5f74d279495e",
    "signature": "0xfeea163b7b2d4a42102e1ec67f99489b91f74b5db89d43c0d1fef0740fd38f875df01703c6a52737ded3d87a0b66dc06853452a8538238ce9e9b907bd553e82c1c",
    "signer": "0x66e1C9Aa2977Ff517D35f2AD8983b3EeA78e6132",
    "userId": "514843811"
  }
}