{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "78123",
    "entityType": "User",
    "nonce": "0xf643f2e5e372cef6f0e1b3a12b6f65d87c04ce37b7327cdaa39a7615cc1d3607",
    "signature": "0x4fad430937cb8593d6dc98b537f1de1f7666e588bbaee396490e12d22cc023d05745730aeb5fa3da8cf3ef680bc094ab0d9bc2d550eb16e0acbfa60da27c107c1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}