{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf39b4a8145a71875618af1893d8dc440e78112ccf0a77463d7a66d2253a69910",
    "signature": "0xaaf3c499ccfc60f464943fd3dc82541fff4ca0b4e3b7897106a54100356b0e4c6c0a26c8325ebab5cddadc735966f7e360836d6736f271ee3aa5cdd23e7331a41c",
    "signer": "0xca3f5Db0A8e57792e9A9FEcDAE13e82175375dE4",
    "userId": "321264851"
  }
}