{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "107281",
    "entityType": "User",
    "nonce": "0x4fc45342b670da1c1aa66b087b274b3a83e2912e719cbceeb09fd366010108d7",
    "signature": "0x7a4bfcd721d049e0c1e21c23044f2bcd4eea811e5fc3c618edd1a9015a5790fd613542ac5e7befcdf14eed60d2b18ce8c793cbb7ba3563cbaf7a5b2442ba0a661b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}