{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "515515570",
    "entityType": "User",
    "nonce": "0x0769d61786be70a94aaf021d8232539d9d175f1c94dc901ee4e1bc2281cbc207",
    "signature": "0x1bdcdb77d0f3f05614af456853563282ae6e1867a4e1124d7969627f153d8544608b501a3a626726d22ba6624d3ae457f6993e39ad81a3819527cd7c3c716acf1b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}