{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3de9efa1441b0d951d6b5285dc25f204e572dd62a77097976edb408a4c053b1d",
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    "signer": "0xc40400Ed20dE2d3d56017558c8B470BA280a96C9",
    "userId": "721511094"
  }
}