{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4a2739d36054653b771ba52aff6090983787d9b7bc20f3438bb7896776f4ea79",
    "signature": "0x8b3e9190231a1cb06c4eba81fa18de9500800765545a373f3ad18867989d3d3b75187b1b5d2644b28885cf975632b3301db3bf746878dd57d9ccca6c29250e5e1b",
    "signer": "0x5D040c7e172B07431383B4bd6Fdd84ed67B8Ba0f",
    "userId": "508547804"
  }
}