{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307",
    "entityType": "User",
    "nonce": "0x80c7de000e558766b142330d74b056feadb21b50145c6af0b12655d5f87a5abc",
    "signature": "0xf72e1454c214f7fcda5a320f8ee779e42b01ab0850858651abe095b234170ff30383ee03a47cea850136bc95bf9bba0b92dab144de34dd027388a7c6bfbbb9a81c",
    "signer": "0x90d627796C9E2071AAd9F8C20f6dCE95587F6d13",
    "userId": "560619378"
  }
}