{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "745901100",
    "entityType": "User",
    "nonce": "0xf8f8fd2a9ea8a06ae277c9e6f815d7b0ffbbe73dc63f86d45a6d652006844471",
    "signature": "0x965cf02effea69477905c338d3b540cfdba8abcfaaf6133f3fdc2a674e0f10247f2d4a8373296f3f18c6df82a51a9876756ae61d874c8057899a50dd5ca597b21b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}