{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "878327107",
    "entityType": "User",
    "nonce": "0x7a5c5417d5b24b7e6b02a26b95503cba85b94b92440d4431ad67adb8c3f9a1e2",
    "signature": "0x4c7ea7a5248bb95c6ec4caeb599b07368d23937f845b96df3faeb3edf7e2a8715e61192256a515b9abcff6567c7b94b6afcdb0b04e7535360a8455da5af9b81e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}