{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "219525",
    "entityType": "User",
    "nonce": "0x1e5b2581e08f29b6d628f07f6aef2570a01b7493514471af4a3db1fa5c3f98d3",
    "signature": "0xcb4d089e9f852cfa3414c766bcb583072f2972dcce165c2bceb3461a3d530d1c41b74b819bd4c9d9c9c3760e6505bbe134ad80a6e69267dc3b66bbe22ab56aa81c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}