{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "376413",
    "entityType": "User",
    "nonce": "0x53e1ce0b145da395ee47280aa2665aa962afb6bd81bbfc3f6073033d1a5be9a4",
    "signature": "0xbfacde72c8cbc6a8aab77de63b9bf5aabe2f15bdbed45050ad34e91ec12cdcfc1b2ce2ae4a3c5361c416045083cfb874db9d2300a236e47e653c0d0fac1340551c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}