{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "268337517",
    "entityType": "User",
    "nonce": "0x2c576f3603ac0de4134a75a47e03c97c3ea701b3b0c10cf4669ba9690b0aa39c",
    "signature": "0x3e5ca86124f49012d2e81ee55957e7e5a6cdc842a56ff3ab6d3c90ab51ef3e5c12294c18ca2a938231ffcf00256d1bbf0ee1b019f8bd8fa2119c30d795bb01e31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}