{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "666977",
    "entityType": "User",
    "nonce": "0x45c9191aa6d8d17604300e61b417b5aabbf51763022fbdb6b872dd52bf1ef4b6",
    "signature": "0xb21e595bdb8c18cec5579091380c464a40d3e8baa8962cc05496bbc2f2ee8cf72ff3c98f8e10253868d7bec061d815195ba6d5c736e084a9d564e5f63b6268611c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}