{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "308641",
    "entityType": "User",
    "nonce": "0x4d0da0394174e7c65173e9ef8176aaa9802dca446cd630eeabc7c0cffa9708b4",
    "signature": "0xa1cb2015fd65d9b89e9111b20c299c41362a3307f3f625767b05bde7bc584f1e675e474fef79a51956725c57c56b4176070d3c3e32fc7190a478e6926eb149f71c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}