{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x58f4ac0e110f3ca4c36a8920c0ba88f8494c63233afeac1570b9a139fb216b94",
    "signature": "0x49e56adbaae92bc607d9a915a6d173882f9b81e9a72bf30e47c758e3d5406dc634cbd3b3cdeb838c07dc885cd3b6ed8517f7835a36ea52684e9c37d9d58199cc1c",
    "signer": "0x0a6438C3bA17d84444E20E5bcEA4a7b9546E2F1C",
    "userId": "301680905"
  }
}