{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "520381623",
    "entityType": "User",
    "nonce": "0xe3eaca39212438e3732414d22d3c2d36aa7d9aa024d9b7dde1d41bf6dfc90fed",
    "signature": "0xec07f6eca504f40254726a23560a27695cf0600c583f36b01c3811d7bf4b3ba64754b82865423b7b0277ead25e81746185689f1f29815c5b1897ce7800be21411c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}