{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x6eddcaf30b3676a4c9b6fc523beb7f9e2945fe2e33eb39a19a68e710d3f6f746",
    "signature": "0x216fe3cc35195106f48da87b0771a0c808a647efae57c444005b2cf87808c5c94a12d79824079eeb2bc95417de1756007b09c447e7393a6930d74e053685d7a81c",
    "signer": "0xaC5cce7598F0Eb17aaE90fc5c8221B0312d77aFb",
    "userId": "329521655"
  }
}