{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0x052a4b1c39dc57f95bbe64e6418dd9d00aab85608a90ee25bce7fe69a1661166",
    "signature": "0xaf99def8cc51389857bda62f3b6e397a6a8335d1a5208c588d7668f4c5de0ec542f7a561186691c49aec0cee56f1cab435f2556f733e31e420a0cee1f1c9c55d1c",
    "signer": "0x8238ad57BCE4834C1129e35B137aCF58C2406fFa",
    "userId": "574348213"
  }
}