{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "664739271",
    "entityType": "User",
    "nonce": "0x99ee7780e2926e4d7390eae12ec9bd05131905ac58f51726ded37b38112e0f2d",
    "signature": "0x5ff3fc9d4dd4b18a3bc1c9f8dd73e33a363172870a2593348588ace60dc16eeb0bfdea48303a09cc71f38e74b10b79943f0c5334d962e833033d3afb29fe6b031c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}