{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x52314495ddf5dcb4676d077c0d321b369f07c791e86819b5f34d46187c2665ce",
    "signature": "0x90a2ad2dfbb2e5dc9c7a6c7fc996a944cf8bbf292b6cd5de4a6c408a95205edb76ddad84fb221afc3273ba0db69f3d62f4915616b14751ddff9b6eccbf0355ba1b",
    "signer": "0xf1dD1854B8D46B522786273450d30d2Cdfd4deE0",
    "userId": "221417134"
  }
}