{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12674",
    "entityType": "User",
    "nonce": "0x1f4d90b47f7562d0f445bbb8bb25cb4eeaa930ded46ad36200183cd0e19efc36",
    "signature": "0x944d81de23d4569434ce7c7c6e8468f4316892d6ba5fea087e2ccd16b932c34b4f95058a6e9c1237c099ab4bbaa44c6bf5ef990c4cf9b7ea46cd48ac3d22c2d21b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}