{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339339",
    "entityType": "User",
    "nonce": "0x9b3b3ff838986d8b420226ef4254c59637c7561d24cae9e6797b2382314110e5",
    "signature": "0x34d65972a2ee4a320e17821365ee05d25299b07dcf1fe0b469f008d1f9e235280db1b5a27d13d5b6b646619c5ca4e4239068f0128c42be46021da962d9f906791c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}