{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "789943876",
    "entityType": "User",
    "nonce": "0xc3513d476c0a8ce5f6a93359eabb478bcfb02172cec13a0bf5dd16bc63b00f30",
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    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}