{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x981671c9123c00ca1d8469842a980e2111b587bd1deb29a81056c0303ba66313",
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    "signer": "0xB62549ad787761DF2C662a270934b570704A7F53",
    "userId": "492987452"
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}