{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "338871",
    "entityType": "User",
    "nonce": "0x60c649081d3f07fd09650b5ccc7b6b82d61097eb721b2d990088e60a05134221",
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    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}