{
  "manageEntity": {
    "action": "Update",
    "entityId": "621534741",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierah7byjtirestvuduw5yaq6smu522qz7fswygfdc7pahat6gxyouba\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1165258217}]}}}",
    "nonce": "0xabffa799d626d595cce1612b4c4a83c79c490a210db63311161a2f778da60064",
    "signature": "0x5682fddd59e82cac79131b0dfd14581470c6318f1d0348e5998b353325972f4a1337b08d3b36e8f65de0551a0d7357be77b71fdaab198b1ac757e610880a95a11b",
    "signer": "0x7c9023569D0688566422657303CC9788011C2a7d",
    "userId": "621534741"
  }
}