{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7321",
    "entityType": "User",
    "nonce": "0x75d411d24d579b6ad8c4d3abea76f638f7697db50a8555358278c512413cbdb6",
    "signature": "0xbe0ae948059cb1d5eb266d528b6e433001e1df78f5839859c917831273d4719b54aeed9485532ab572206d29990e1774410b608d35f85c63af8238c8503a0b2f1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}