{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3b50cbf6b484511e3bee8f4aa4f64158fbf8d3b7c3a03309d7a9b37be28b67ca",
    "signature": "0x00d57d67b726f7aea5fd0883478592582fa77ef719ee511f410ff8a8b7e552ec224d65a3ab2f4597c8599f64892aff84c47980a88b947ff6baf74ba84fdb6e061c",
    "signer": "0x8aC82278ECCcB07F5CD48853c1759c104aD8D7f7",
    "userId": "100670519"
  }
}