{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2857",
    "entityType": "User",
    "nonce": "0x8ed571b9997fc8bd9da983e8edd7253693edd27b3d62c7df1779f6e28af36e76",
    "signature": "0x67326c5c19e23d01df6a90c4c2abb198535164302b963cb7fcb7e67a2084f09874d33c8e8bb81ad268f1ceae0bf78e7f36c2f5a60b6a92319948c08167a312661c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}