{
  "manageEntity": {
    "action": "Update",
    "entityId": "777053701",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x693ac253ab9bfa170ac4c2c20eea73d5561f107f55212e3009397f556b0a8a44",
    "signature": "0x826ee3ccd33d9bd9c3026072541d1180a315d0fe90a91387e27fb5daebe3f98d33b8a8cc891a39ea544060a00da380bd4cb27617471bde6d413940b35c60ed4e1b",
    "signer": "0x672642f12eDaF9fc5e6674F85E4D7f121474C137",
    "userId": "777053701"
  }
}