{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3a4f7b7bffc6c63e81a9a77aefdd6b4704dd2700e104dc56f81f2a4bab8b6a4f",
    "signature": "0xa2974f8595679ab5944e90405da91c750c79ac5e2b0dd03ea5f361a08829bd862ec19803c94997d877d500ad03ef948d30ec202c4fdd749eafc317c9a70818091b",
    "signer": "0x0c1d536a8e25d462f7b228e2c1AF7bE925bD76C7",
    "userId": "175367139"
  }
}