{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9a684be1d563ca6a2256410eac5cb33c1d89a3444a16aea7ba8c05800501aa72",
    "signature": "0x9965377c29b57cc580079c6b419034bba00123a4269c706a0111e9d5ecb432880c925008021c9e6bc7dcc89e41f97774bdb4977a4923dd7aa98a91e363e835b81c",
    "signer": "0xC3E621605eB460c0816bEC8265a1630818b980b7",
    "userId": "881475117"
  }
}