{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1508888",
    "entityType": "User",
    "nonce": "0x7cd7364267c638cf039d91ca183e7216bc26ba1ef259bbd3d59929effa800373",
    "signature": "0x405d5dcf6ca90d8c95a1f36040268fc664842dba6bc2d14dd452d03f3dbc56b04a417bb0ad0f33debe1387fed652fe6ee3145a4cb3619e2e6a67978d5d33e4fc1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}