{
  "manageEntity": {
    "action": "Update",
    "entityId": "906689705",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6cea470e62f6ff59fa80bb1d03bbd5229b76ba9f605139a3011347dd89cf4dec",
    "signature": "0xcf1fbcaee9de962fbac13a575ae98a1869553bf0d0bb8181ea266b6072327d4b1ce5dc95d105d800f81db2650ba3b8e11c118e80679ce771afb07a7f07f0c5701c",
    "signer": "0x603B64C3E849f28D295D60D19f846885109881d1",
    "userId": "906689705"
  }
}