{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4af50bbbeac4aaa6dde4e2170ecb92e5293592172023ca25a8ecd022ec854a4b",
    "signature": "0xdcc62ac03f799441d9ebb03d296e2390ccc1f3be7f0e2bf080b54bd7e40261811ed4437a8e7e9e4a5204992a3ac2df29219faa98bc8cebe3bd9b7270097ffa121c",
    "signer": "0xB4F2576E2fEd995312c667E9f3Ec9A31D58e557B",
    "userId": "157296678"
  }
}