{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x78a55698ff0bb271c22b012c4e9276f88f2f3776d9e2b2a07632dc2e31652579",
    "signature": "0x9d5af7e83c36f14443be8f359cc7db7f7172f61662621c5094f7d698c1ecc542393d6035e5bd07435eb23fbe1e8c35e2c18ae861710a9a8ced9bfe8c120b94eb1c",
    "signer": "0x89F0c56e3D49B999889EbA45A7753e4AfDa0FEC4",
    "userId": "106183206"
  }
}