{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "197768",
    "entityType": "User",
    "nonce": "0xdd670cf825eeb5d2a2f99c5ea9c0df0438fbcaa4b33d27d7a18176dd650f1d2e",
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    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}