{
  "manageEntity": {
    "action": "Update",
    "entityId": "297301449",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x201405ccdda96aa8918b22c1d5df3d2e6c1c66d935f1da0223d3b6ee1822ad46",
    "signature": "0x7515deef079ae14d586867c4cf63f993192f9eea8a14af193bb2bad70c6974947e88162baff12f8bc071675f88c438f0f361b4d44be65a1a8d08c0fa4a655cee1c",
    "signer": "0x7f590bEFD43b7cCcF038372CE50C813B4290A5f4",
    "userId": "297301449"
  }
}