{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x72894456c53f44ff61cbf04ca74e59561ece3eeca954580db6a370c354d623a8",
    "signature": "0xe81baf35d03ab9e272b3e2746be0976586633ceb6be0173dd6ceb37f725717bb422b2a34f8da51523bb534dd1967e1fdaa614ece64a50002a1d68f1799d09f741b",
    "signer": "0x54ED3C5B13b86Fc420a6bD0D93B92086369BEEB3",
    "userId": "783546574"
  }
}