{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x44d017bf3703b1f0217927151f214fbe66fbb0c75b97578db2cc6b50fa04f8f5",
    "signature": "0x69029c51a665ccbc478ba146d92075a672ca9bfa3be7a6fad14c3f723a17ffa028f2b0dba34044c182af1f727b26eb401189c11c9ace52a91629fe4d3b46e7341b",
    "signer": "0x4a860F350364043d456D56DBF9D99252A1E2a164",
    "userId": "5462986"
  }
}