{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5833d1622e5a95f355e7f45c279652c8d24530c9ee1a329c7ba8caa1197dd6ce",
    "signature": "0x5ce4e7976d9a71d75c49ee0d96266d0d3561b77351b065f40ba0e9129a4f52a77d6722a2caec3527489db740a34d59326eb9673b40cc64d44cebc5952b5e848f1c",
    "signer": "0xcBbCD21EDD5e8923122f0409ba8F5885669bC80F",
    "userId": "261549941"
  }
}