{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "603549127",
    "entityType": "User",
    "nonce": "0x6ca88aefaee77177ebc0f306b9e0237def19495323e7ba3aafdd0af043ed88cc",
    "signature": "0x1b8726c8b0b1c9f649787b2acad7d0e82313d7e9cc9a68b51e0a560c932de62a488ebdea620911aaed04fe4bbbed2e47ea1fbde184aeb3e92e972ad2d32f2d0d1b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}