{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "815915982",
    "entityType": "User",
    "nonce": "0x7833a9fa51a85d36f2477de905714f5440bd89f8128e33848c60ddd32512e56c",
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    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}