{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xfbf56e3c45590d265ea059e9914bbb5cafccfc41c1d7de060021c58af74759e0",
    "signature": "0x6f00547f2b3b53817e271ae137a4e26d65666e289cb79b064516c69a6889cf321285c810b8c4f0496290978f7585cb4c9b8f68b35a524857c620d202b07f62a51b",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}