{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xc4a7b51cc491bf556f343840a7869323300fb7ec675cbfe442ece00aa95647f6",
    "signature": "0x15bf2d80469b382e40307f646119a048d3781a5959dd93271dc635f7fd6b73cc5d4aaef02d94cffc388fd5838b9d137197a1e042eda06001812f6330d8e80fb81c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}