{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3d64e377d446a4e7402a6a7b5b536fbf040302b3d0141b6f2eb2bab31e2d644a",
    "signature": "0x446791f76727d577a1472884f28ba548192e311b5493497d968bbf2a30646c291a32ae034a6241589e7b0b18a304140452beabecd4e23b7b3c88219eb96f9d6a1c",
    "signer": "0x0080a3F9e4a8408e4c6de08e3f68c64a4B366F1B",
    "userId": "738489255"
  }
}