{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "668504116",
    "entityType": "User",
    "nonce": "0xb0de8b072ab80ff7dabee87c924ca55ab4972a0500a06d9d9b5fe2773b2e7ec6",
    "signature": "0xf1be0142db81dc588542387cbc2afcea976d378e268d13c8ae51d47c7ff3705553445f0d45739d32dacc69f2bc8956ea84d58aa87af16bfde09d155b575cd3171b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}