{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "542613447",
    "entityType": "User",
    "nonce": "0x1c6deb7b874f4fba0acc7e9f78aadfac90c20fc1d85dcf9e0df3bfb064f5125a",
    "signature": "0x90ce4ce58f7fc7df4cdadb5da5db6da9e254ceeef32f81db8d8a91609e71db5e539fe2d17e71b331e82c01939bd04ccd2533dba0578655a5a3a0361e8921449a1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}