{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0x6021c139b9d4913009feffa202f0d599dac5ed4514e10c8608fd3434c69e1b1d",
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    "signer": "0x1c4e2947b5F9FA4A927a23897193150631C1DA35",
    "userId": "933435942"
  }
}