{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "640431449",
    "entityType": "User",
    "nonce": "0x8fc65fb7bff9729602289ef1baebf4c51c0e1c704f0a11e2a28e4e06daca3749",
    "signature": "0x764c9c628f2de3989be899e95517f898e00b2b42fa81007441468f5f68ef75454c8cba7025636151f3f76a95e2680390b54dbd90b802e406a63b97cfec5088291c",
    "signer": "0x814bF6C5a7eEbEB0e272d231d51f18F74F1363cF",
    "userId": "276247325"
  }
}