{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd9dca8f763df7485670ec20ea2093b27ef06766528de15e4f56aa1bcef529cff",
    "signature": "0x0a73f49fb2cc83fd064be6645b61eb675746a98c240dadb133a5aaf36025600b29feaae9f5092b418d0b6e80c2d9772b44612dad7eb6df79d0bfca2ef7f837ba1c",
    "signer": "0x644fF4B4D4582FA06F98090ee11a884870093ACA",
    "userId": "575648795"
  }
}