{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304757",
    "entityType": "User",
    "nonce": "0x72445c144c78bbad120c1d371d797577ec5a743546a82a9fcd24c1fbfa4062b1",
    "signature": "0x5c1d49915d9df273b6233239c857873e741285661fefe9bcb918c08ed01c932a14ec186cb9bdfe3db916f1964b9255ef5060fc1d89c64ce925577506060385481b",
    "signer": "0xE4c0c73a0c0CD7f65f1bE942f8127c8753aB89D9",
    "userId": "857284925"
  }
}