{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x968b88e299207f26699dddd981a62488a1bc92ee7b79f8791e403a6f7cfeee0b",
    "signature": "0x2213eceb960a5bae86a1c91904c435601dd5d1c4b72502af922473b1a41fcc325c53042b7f68e98a85e2af17c6f9b3791b9fc623cce3b69c09220c7423b1078a1c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}