{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf21cccdc61859008f687b3ad39cc67281a033aeedefc97987ebd4d0b2aa61ca9",
    "signature": "0xe6f7586d84e80cb483b654123b02aa16d068e336155d5462ecab7aad757c86db2db5add71b43281c04a173c0cf65c5e17364944efccc74f2c87c3959b95eed9c1c",
    "signer": "0x4f15f53cFB660Be58Ba511f115dFb2881146ED45",
    "userId": "560300424"
  }
}