{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304857543",
    "entityType": "User",
    "nonce": "0x2af37da49c410f5288de5404949c9269cadb5df39f3f3de075ca6a27e986d1fa",
    "signature": "0x491375001667cedb93a4e77dc95a736cbb9d1da707ba4b0d519bbdc04c6f8f5c77af71fe0d990e0049f58ad5fcf88d253080af28692cb2f4f98254f103e2134d1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}