{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ddcf50e2cdb7f6d7eac453063b48ff1db3378390092c3009a9cfc8e4894946a",
    "signature": "0x1105cb852a37d3f8f00d6a7eecf4f6e28298f51427c1b37c3ef9d3ca1449076971b6225b0db3811a6e64d4ce70d87060ce0df53d9155ed737b8634ecefa027961b",
    "signer": "0x03f23B545C25E9A6d1e2007d77344EbE9a521Cf3",
    "userId": "325096995"
  }
}