{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "683609933",
    "entityType": "User",
    "nonce": "0x91a18e420ade5a5fb68ad5b77a6edc58a5e5dbdaa4ac202139198f682ae506e8",
    "signature": "0x55c69016ee8a9a73c1414b59720998707cf140ca675a9ce1126c33253a82c0aa1709fdcc41670ad661e2e5802809e29f41839e19763439be55221ec42961dead1c",
    "signer": "0x854726bE5910ceEe19fBd2D4CE0518966CA41382",
    "userId": "124312"
  }
}