{
  "manageEntity": {
    "action": "Update",
    "entityId": "876735576",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x37d926b087775342c6f02303aaff5705bee4bb4ef9844a5946cfd1d0fffa3fff",
    "signature": "0xbbc9fd3dcc58b2cc739964d95c8e3a618fcdf018fd1884ca245bc672cf63f35255ce3b3f46cd092ceb451ff0440397d17a15bb8a7def69b1df3af0f8e4569c241b",
    "signer": "0x1A03dB80e576Ab52a1E1852ba81778ae8f8f3f95",
    "userId": "876735576"
  }
}