{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "389780",
    "entityType": "User",
    "nonce": "0x5d40742bdd6359e984c6426b724a40b3b3ccf3e212e3cf1adcf6b235efb86520",
    "signature": "0xcad09055ca336b1856171cf00e2a0a336d261446eda0620a55e1eb9b41f08fe32e9266b7466e44dd046d8214fe0904318ddba4c62ff6bd9dd26124ed0e3273ea1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}