{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x500c4323621521b700a23cad680f6db90ad6aeeed82e5a0883b2fb5f7f29878d",
    "signature": "0x7b9f803d9df5d48f498516ce39e27c807114f4c796bd6ee9cb05c29c4529f64d4f39b66c31d3bcc017ba496481b3620dabdb4520e5bc276ed10285680e6e01861c",
    "signer": "0x8b6750c1f234e1B04A286Efa247F63f7440c8765",
    "userId": "652310831"
  }
}