{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "904230991",
    "entityType": "User",
    "nonce": "0x14e005adf997bc2b4c30c41573fab7703f00879f08eeac727c249d238b76b23a",
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    "signer": "0xDd1895e30358586EdF6fe231496fA9fFD0C1D406",
    "userId": "303232693"
  }
}