{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa660723f83baca729f9752861e73bd1b96cc66fe2bef078c1716f17928da752a",
    "signature": "0x0bf91423ad4c3e15703a969f0ed449b0a6b7399416542deca3163cdb648c97965a0b4d8f4f98aee2f6ea8a4ef63b792b4231418006ae298c54e6df27659cd73c1c",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}