{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648743045",
    "entityType": "User",
    "nonce": "0x8b55f857e43ddadb627c2f0a632a79f1e3489a6e93251e5fa8a336149be41055",
    "signature": "0x90b0d31c098ec65fa7e6c3edd8dad91f3497f5acc3b00b52e569e23407ec9e041fbf9f1d0469fc279db308d68d39b1c320782bf788167f34ce384a90549079281b",
    "signer": "0x3256829bD2C36780Db69b5c18671A1DA06B8d505",
    "userId": "468369673"
  }
}