{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9172e40bc6c3516a01bb3b434b8c4de07f439dabd19d37002af825f91af7e4e0",
    "signature": "0x63055c984aa15ed90fa001ffcfe87290c2031858412e66b082e2f7b4748cc6221e4dd7d43caaf04e558457ac4a5317a299296c7f00f1e216512bf366b167421f1b",
    "signer": "0xA20A7812eB057315eA5D463424Fb3532d425C454",
    "userId": "563548587"
  }
}