{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "624998567",
    "entityType": "User",
    "nonce": "0x129682bfe75955b935f89e3a94fc89a8dbd9dd43033e0bd754598a176919ba14",
    "signature": "0xf91edbc4c6519067c40e9665f9da15d1e67a10b11515932805aa0c11a822c56f697d6426251a38b670d2ac675da3b24bdea9a798ba692b82c2aea636a75377f01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}