{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xff99879082fd86c307e6190d9dcdd98a8c508dc116868416016739d4107130f9",
    "signature": "0xc5264490be312f160498a4489c8f2d360893121a122258f4d01e244ae0ffd1de6eb92fbd9c0661465228b598e80c353dbd5e901666ef1525fc3752b59cef67881c",
    "signer": "0xf794D3d12F805546B3437B9f34deacea98B21161",
    "userId": "890696251"
  }
}