{
  "manageEntity": {
    "action": "Update",
    "entityId": "500178575",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x81e0331b71fb3381e45374e6c3b05a4649c7388a5bc4cce9b91ad545fc8eca21",
    "signature": "0xbe8d3efef9899691466a738735be3b998c6a860cbba844d1a015a68b54d61de94af434eb40f081a38545b19c96d20004acc2a9378a91eb03812b7c27c425645f1c",
    "signer": "0x42ad36888200ADA907d907B61D48E2B24Cfa3Dae",
    "userId": "500178575"
  }
}