{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18748",
    "entityType": "User",
    "nonce": "0x0bb388f56eca6262c6a11e3db06f0af2d5fb73d67e75d0ac260ca0f397f9ddcd",
    "signature": "0xd5940d342047fda12ab4a0ce7fc8e4ea1ea4d38d45312a1749504013a0b8c661079f810fd9c089839f1b8ef17e99d0e62fb9d8683f1eb57a3e26f0d7ec0fde201c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}