{
  "manageEntity": {
    "action": "Update",
    "entityId": "648196771",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xaf137c9a19555ad6969057f896a373b472a0f618f4e7fdd722e06bad9b61b207",
    "signature": "0x082765020a7a40b3f0bf0088d68b79ed37b86a2f9e3d582c7c745b2778bfe8497a3d97bbaf23d8e746ecfffd2af157731231967edca0bfd88c1acfd89bcce6ea1b",
    "signer": "0xb87fFF581cC87c41f5760cBc657a96Fa1C7673E3",
    "userId": "648196771"
  }
}