{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd5e3779feb74e22740712ada15f99157c92fd4292b67b340d9c372c2fc7f9f07",
    "signature": "0x37d9f831c24f7113a8ab4d30bc227f09548dd7bf933322fe92c73b0e4b80af10358aaca2cbf9001c7e61d1f83810d7a7835215075bd15841340b7dec5b1d422a1b",
    "signer": "0x3e48DC5763519fbdE0A26db7C59929E8Bb6B8Fe2",
    "userId": "971129804"
  }
}