{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3d06656393101b97490001a5d7d1361e744f8c34504af4330829617d3617e4cc",
    "signature": "0xc9cf6eda0501dc592851bbd1c593fd1dfe4ae59a3accbe4f29c7a06e5c0d1b95414e40393355d5656f6f182b806ad572ef87ed82b2d26e9e4e8bf16b59821d501c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}