{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6ff244dd99bbdca8b0f111e1c8cf5a4113be33eb541dac0f0c2192309c391021",
    "signature": "0x108475b2d0cbb71cdfacd4a5b24c47bbe0d87f3e11318e5bfcb520fe10b2b88f6a2f57b99d1dbf0cd4a288b27b66ded2fad87e5262b86b6201122d14745fefc91c",
    "signer": "0x51Db1bf67B63F93f93FD0535edbeb523458Bbfa8",
    "userId": "867308416"
  }
}