{
  "manageEntity": {
    "action": "Update",
    "entityId": "517242286",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3af00b43ed2eb21c5f63f0f3a1ba0840c08bd0a7114b6ce1fbc8d6d0d4b296b8",
    "signature": "0x63f6a38a60a13723b2c56baa917ecab93fdd1f8ccca27a91345c18710c9774f7659d9563995286abcdaa259dc5664fccb6afb30ac0694aee974c93e3be966d951b",
    "signer": "0x5e750f0FDA2ef553d8dB7952bc515c5Ac0e728C6",
    "userId": "517242286"
  }
}