{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0xb5958cc6f47ecc173a83162b00b494c4c09e69268a1b8fcb111c0b4f94d07912",
    "signature": "0xe8f738d14ff68701fe651fb6460dcce6e2597c8269c987232adb33b80ef368f42870b2181ac4f2e0677d39764ce1bda39459e3b9e32bd08d3d8bad96ca0b6ae41c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}