{
  "manageEntity": {
    "action": "Update",
    "entityId": "549983695",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieracz3tx4yxr3dxarnbuojyxs3jjkydxyfclmm5pjfes7syjgpdssiq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":1797343841},{\"type\":\"playlist\",\"playlist_id\":141932335}]}}}",
    "nonce": "0x41f9c2efaeea0bba41262e9ca0b2071c11e0bfdc5545b7945f4e9a0986aa9604",
    "signature": "0xaeb05db51f2f64571825418f157763b75098b70a4af6e798bf5a22e98933812a7e2d89f1f7d266f6180e899ecab9b684d36ae773c0dae04181a43eaa724889641b",
    "signer": "0x5877F7e1aB261CEa57f1734519117Ed49d50c8c3",
    "userId": "549983695"
  }
}