{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7504",
    "entityType": "User",
    "nonce": "0xf7914e495f2d975830326035f37d955b837c91a53e55b152a07a8ba33cdd2f45",
    "signature": "0x85cd5334c7c214e79119d6c6408ca556fad86de9f23e3d565a9db125e222dfb10a90a53c1e3412c39e8ce4df30f5b1c2c446a8d8a2b5f0b9cf9f0a3dde49cf581b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}