{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1515603",
    "entityType": "User",
    "nonce": "0xddfa5f98187bea4f8a9d27b9a34b4f92122b931dc75d8d6133d0194b81e04476",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}