{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x98e51deac87808682a712ca7374dfd3d25477ef77e917fa406e7fe2ec2db0f1f",
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    "signer": "0xb77b0a8Ed4a43a5834172d20fF4ce7EDd96Cc5FD",
    "userId": "387640079"
  }
}