{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "6510",
    "entityType": "User",
    "nonce": "0x61eeffcee9ff83c47d787f58888969efe6148fad7c0caeda1407636c9030424c",
    "signature": "0x9438d45f45b1a7360aa50030a814523679e908549634b87698898b816e240c3a15b08cf5c23be6188f018dfbf149d26e147a01c725af80c535dba3f424356f3b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}