{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "603",
    "entityType": "User",
    "nonce": "0xd30a258ea6c0478dcca14d450d4fd9a28ce8d7dd3c1bc7f53ee9280c699a6c81",
    "signature": "0x39956b0e71453c672b8ddff457ab404fd92c6e90fe6bcc6759edb55ab18d11ff24305e91a6cc1735f5b8797208c4269566c66835b4f95d6e82f1d075d8f470d01b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}