{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "515515570",
    "entityType": "User",
    "nonce": "0x2ffee37f658de7ef0990005363aed151347b95c8b4faf5f7ebab5276cfcf7aad",
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    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}