{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0x5b26e766693b444e1a72c990b2a68f594ef19ebccc6d0d342465021aefda6d99",
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    "signer": "0xD5207527A3A5f799aA45ab3dc2ad4CC7f3617253",
    "userId": "849737890"
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}