{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "753712",
    "entityType": "User",
    "nonce": "0xc6bc39f5dea16f89579b3757a210d98374f9dce7aa38c1e6240a86c4ecd21f19",
    "signature": "0x021ec7d4518b79d678b873d85dc32badf353b52a63db2a6a216cb448ef19db024f18c9d03f5b93298ee58f0b5b64aa9fb531653c7ea5b8f225a5e2047f891e8c1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}