{
  "manageEntity": {
    "action": "Update",
    "entityId": "1422350417",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"playlist_contents\":[{\"timestamp\":1778505733,\"track_id\":632652},{\"timestamp\":1778506089,\"track_id\":632652},{\"timestamp\":1778506230,\"track_id\":810977}]}}",
    "nonce": "1778506231100223084",
    "signature": "0x4119e220851669dc085b42cb3eacc9d861f907ff14fadddd1a102071dc8b5ce07fef161ebcf23a6bcd97e3754daaa590fae4ae32a7c8903ea872b883a642a8bc1c",
    "signer": "0xecaC916FafF0E75Df08fc73D2252307ae8DF8981",
    "userId": "477662771"
  }
}