{
  "manageEntity": {
    "action": "Update",
    "entityId": "353701640",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6493ce97bad00103e5af05a9225780386aa9074a1c8a65d2f1301cd2580d9bda",
    "signature": "0x17616798564955c4529236ec0584aca3b9ab3f86ae3c74fe3a204b823f9f098908ba864b5066c3ca19d5eb72a0d71c01d408e8ecfabd82773dd3b0240a3dff221b",
    "signer": "0x3a5365a74ef25321130DC828Bc1f9CDc3066D40a",
    "userId": "353701640"
  }
}